diff --git a/opentelemetry-appender-tracing/Cargo.toml b/opentelemetry-appender-tracing/Cargo.toml
index b6b7cbee9a..9203101e2b 100644
--- a/opentelemetry-appender-tracing/Cargo.toml
+++ b/opentelemetry-appender-tracing/Cargo.toml
@@ -14,10 +14,10 @@ rust-version = "1.65"
 log = { workspace = true, optional = true }
 opentelemetry = { version = "0.21", path = "../opentelemetry", features = ["logs"] }
 opentelemetry_sdk = { version = "0.21", path = "../opentelemetry-sdk", features = ["logs"] }
-tracing = { workspace = true, default-features = false, features = ["std"]}
+tracing = { workspace = true, features = ["std"]}
 tracing-core = { workspace = true }
 tracing-log = { version = "0.2", optional = true }
-tracing-subscriber = { workspace = true, default-features = false, features = ["registry", "std"] }
+tracing-subscriber = { workspace = true, features = ["registry", "std"] }
 once_cell = "1.13.0"
 
 [dev-dependencies]
diff --git a/opentelemetry-http/Cargo.toml b/opentelemetry-http/Cargo.toml
index f9b8ee96c9..4429d148a7 100644
--- a/opentelemetry-http/Cargo.toml
+++ b/opentelemetry-http/Cargo.toml
@@ -13,9 +13,9 @@ rust-version = "1.65"
 async-trait = { workspace = true }
 bytes = { workspace = true }
 http = { workspace = true }
-hyper = { workspace = true, default-features = false, features = ["http2", "client", "tcp"], optional = true }
-isahc = { workspace = true, default-features = false, optional = true }
+hyper = { workspace = true, features = ["http2", "client", "tcp"], optional = true }
+isahc = { workspace = true, optional = true }
 opentelemetry = { version = "0.21", path = "../opentelemetry", features = ["trace"] }
-reqwest = { workspace = true, default-features = false, features = ["blocking"], optional = true }
-surf = { workspace = true, default-features = false, optional = true }
-tokio = { workspace = true, default-features = false, features = ["time"], optional = true }
+reqwest = { workspace = true, features = ["blocking"], optional = true }
+surf = { workspace = true, optional = true }
+tokio = { workspace = true, features = ["time"], optional = true }
diff --git a/opentelemetry-jaeger/Cargo.toml b/opentelemetry-jaeger/Cargo.toml
index 54bc16e554..92a5f30a3c 100644
--- a/opentelemetry-jaeger/Cargo.toml
+++ b/opentelemetry-jaeger/Cargo.toml
@@ -25,9 +25,9 @@ async-trait = { workspace = true }
 base64 = { version = "0.21.0", optional = true }
 headers = { version = "0.3.2", optional = true }
 http = { workspace = true, optional = true }
-hyper = { workspace = true, default-features = false, features = ["client"], optional = true }
+hyper = { workspace = true, features = ["client"], optional = true }
 hyper-tls = { version = "0.5.0", default-features = false, optional = true }
-isahc = { workspace = true, default-features = false, optional = true }
+isahc = { workspace = true, optional = true }
 js-sys = { version = "0.3", optional = true }
 opentelemetry = { version = "0.21", default-features = false, features = ["trace"], path = "../opentelemetry" }
 opentelemetry_sdk = { version = "0.21", default-features = false, features = ["trace"], path = "../opentelemetry-sdk" }
@@ -35,7 +35,7 @@ opentelemetry-http = { version = "0.10", path = "../opentelemetry-http", optiona
 opentelemetry-semantic-conventions = { version = "0.13", path = "../opentelemetry-semantic-conventions" }
 opentelemetry-jaeger-propagator = { version = "0.1", path = "../opentelemetry-jaeger-propagator" }
 pin-project-lite = { workspace = true, optional = true }
-reqwest = { workspace = true, default-features = false, optional = true }
+reqwest = { workspace = true, optional = true }
 surf = { workspace = true, optional = true }
 thrift = "0.17.0"
 tokio = { workspace = true, features = ["net", "sync"], optional = true }
@@ -47,9 +47,9 @@ prost = { version = "0.11.6", optional = true }
 prost-types = { version = "0.11.6", optional = true }
 
 # Futures
-futures-executor = { workspace = true, default-features = false, features = ["std"], optional = true }
+futures-executor = { workspace = true, features = ["std"], optional = true }
 futures-core = { workspace = true }
-futures-util = { workspace = true, default-features = false, features = ["std", "alloc"]}
+futures-util = { workspace = true, features = ["std", "alloc"]}
 
 [dev-dependencies]
 tokio = { workspace = true, features = ["net", "sync"] }
diff --git a/opentelemetry-otlp/Cargo.toml b/opentelemetry-otlp/Cargo.toml
index 375a6e3cc1..ce9fe6ae66 100644
--- a/opentelemetry-otlp/Cargo.toml
+++ b/opentelemetry-otlp/Cargo.toml
@@ -39,8 +39,8 @@ prost = { workspace = true, optional = true }
 tonic = { workspace = true, optional = true }
 tokio = { workspace = true, features = ["sync", "rt"], optional = true }
 
-reqwest = { workspace = true, optional = true, default-features = false }
-surf = { workspace = true, optional = true, default-features = false }
+reqwest = { workspace = true, optional = true }
+surf = { workspace = true, optional = true }
 http = { workspace = true, optional = true }
 serde = { workspace = true, features = ["derive"], optional = true }
 thiserror = { workspace = true }
@@ -51,7 +51,7 @@ tokio-stream = { workspace = true, features = ["net"] }
 opentelemetry_sdk = { features = ["trace", "rt-tokio", "testing"], path = "../opentelemetry-sdk" }
 time = { version = "0.3", features = ["macros"] }
 tokio = { workspace = true, features = ["macros", "rt-multi-thread"] }
-futures-util = { workspace = true, default-features = false }
+futures-util = { workspace = true }
 temp-env = { workspace = true }
 
 [features]
diff --git a/opentelemetry-otlp/examples/basic-otlp-http/Cargo.toml b/opentelemetry-otlp/examples/basic-otlp-http/Cargo.toml
index 2a8a6731df..303696fb57 100644
--- a/opentelemetry-otlp/examples/basic-otlp-http/Cargo.toml
+++ b/opentelemetry-otlp/examples/basic-otlp-http/Cargo.toml
@@ -14,6 +14,6 @@ opentelemetry-appender-tracing = { path = "../../../opentelemetry-appender-traci
 opentelemetry-semantic-conventions = { path = "../../../opentelemetry-semantic-conventions" }
 
 tokio = { workspace = true, features = ["full"] }
-tracing-subscriber = { workspace = true, default-features = false, features = ["registry", "std"] }
-tracing = { workspace = true, default-features = false, features = ["std"] }
+tracing-subscriber = { workspace = true, features = ["registry", "std"] }
+tracing = { workspace = true, features = ["std"] }
 tracing-core = { workspace = true }
diff --git a/opentelemetry-otlp/src/lib.rs b/opentelemetry-otlp/src/lib.rs
index b886ad0601..ff346aef70 100644
--- a/opentelemetry-otlp/src/lib.rs
+++ b/opentelemetry-otlp/src/lib.rs
@@ -80,6 +80,38 @@
 //! [`tokio`]: https://tokio.rs
 //! [`async-std`]: https://async.rs
 //!
+//! # Feature Flags
+//! The following feature flags can enable exporters for different telemetry signals:
+//!
+//! * `trace`: Includes the trace exporters (enabled by default).
+//! * `metrics`: Includes the metrics exporters.
+//! * `logs`: Includes the logs exporters.
+//!
+//! The following feature flags generate additional code and types:
+//! * `serialize`: Enables serialization support for type defined in this create via `serde`.
+//!
+//! The following feature flags offer additional configurations on gRPC:
+//!
+//! For users uses `tonic` as grpc layer:
+//! * `grpc-tonic`: Use `tonic` as grpc layer. This is enabled by default.
+//! * `gzip-tonic`: Use gzip compression for `tonic` grpc layer.
+//! * `tls-tonic`: Enable TLS.
+//! * `tls-roots`: Adds system trust roots to rustls-based gRPC clients using the rustls-native-certs crate
+//!
+//! For users uses `grpcio` as grpc layer:
+//! * `grpc-sys`: Use `grpcio` as grpc layer.
+//! * `openssl`: Enable TLS supported by OpenSSL
+//! * `openssl-vendored`: Same as `openssl` but it will build openssl from bundled sources.
+//!
+//! The following feature flags offer additional configurations on http:
+//!
+//! * `http-proto`: Use http as transport layer, protobuf as body format.
+//! * `reqwest-blocking-client`: Use reqwest blocking http client.
+//! * `reqwest-client`: Use reqwest http client.
+//! * `reqwest-rustls`: Use reqwest with TLS.
+//! * `surf-client`: Use surf http client.
+//!
+//!
 //! # Kitchen Sink Full Configuration
 //!
 //! Example showing how to override all configuration options.
diff --git a/opentelemetry-proto/Cargo.toml b/opentelemetry-proto/Cargo.toml
index e3c11e81dc..19bc3ae0dd 100644
--- a/opentelemetry-proto/Cargo.toml
+++ b/opentelemetry-proto/Cargo.toml
@@ -51,7 +51,7 @@ with-serde = ["serde", "hex"]
 
 [dependencies]
 grpcio = { workspace = true, optional = true, features = ["prost-codec"] }
-tonic = { workspace = true, default-features = false, optional = true, features = ["codegen", "prost"] }
+tonic = { workspace = true, optional = true, features = ["codegen", "prost"] }
 prost = { workspace = true, optional = true }
 opentelemetry = { version = "0.21", default-features = false, path = "../opentelemetry" }
 opentelemetry_sdk = { version = "0.21", default-features = false, path = "../opentelemetry-sdk" }
diff --git a/opentelemetry-sdk/Cargo.toml b/opentelemetry-sdk/Cargo.toml
index 570745d9ca..07ad5d8eb6 100644
--- a/opentelemetry-sdk/Cargo.toml
+++ b/opentelemetry-sdk/Cargo.toml
@@ -17,17 +17,17 @@ async-trait = { workspace = true, optional = true }
 crossbeam-channel = { version = "0.5", optional = true }
 futures-channel = "0.3"
 futures-executor = { workspace = true }
-futures-util = { workspace = true, default-features = false, features = ["std", "sink", "async-await-macro"] }
+futures-util = { workspace = true, features = ["std", "sink", "async-await-macro"] }
 once_cell = "1.10"
 ordered-float = { workspace = true }
 percent-encoding = { version = "2.0", optional = true }
-rand = { workspace = true, default-features = false, features = ["std", "std_rng","small_rng"], optional = true }
+rand = { workspace = true, features = ["std", "std_rng","small_rng"], optional = true }
 glob = { version = "0.3.1", optional =true}
 serde = { workspace = true, features = ["derive", "rc"], optional = true }
 serde_json = { workspace = true, optional = true }
 thiserror = { workspace = true }
 url = { workspace = true, optional = true }
-tokio = { workspace = true, default-features = false, features = ["rt", "time"], optional = true }
+tokio = { workspace = true, features = ["rt", "time"], optional = true }
 tokio-stream = { workspace = true, optional = true }
 http = { workspace = true, optional = true }
 
diff --git a/opentelemetry-sdk/src/lib.rs b/opentelemetry-sdk/src/lib.rs
index aefcd6f93c..f6fd471dcb 100644
--- a/opentelemetry-sdk/src/lib.rs
+++ b/opentelemetry-sdk/src/lib.rs
@@ -79,10 +79,19 @@
 //!
 //! ## Crate Feature Flags
 //!
-//! The following core crate feature flags are available:
+//! The following feature flags can used to control the telemetry signals to use:
 //!
 //! * `trace`: Includes the trace SDK (enabled by default).
-//! * `metrics`: Includes the unstable metrics SDK.
+//! * `metrics`: Includes the metrics SDK.
+//! * `logs`: Includes the logs SDK.
+//!
+//! For `trace` the following feature flags are available:
+//!
+//! * `jaeger_remote_sampler`: Enables the [Jaeger remote sampler](https://www.jaegertracing.io/docs/1.53/sampling/).
+//!
+//! For `logs` the following feature flags are available:
+//!
+//! * `logs_level_enabled`: control the log level
 //!
 //! Support for recording and exporting telemetry asynchronously can be added
 //! via the following flags:
diff --git a/opentelemetry-sdk/src/logs/log_processor.rs b/opentelemetry-sdk/src/logs/log_processor.rs
index 4b7c10499b..bda7730283 100644
--- a/opentelemetry-sdk/src/logs/log_processor.rs
+++ b/opentelemetry-sdk/src/logs/log_processor.rs
@@ -490,7 +490,15 @@ mod tests {
 
     #[test]
     fn test_default_batch_config_adheres_to_specification() {
-        let config = BatchConfig::default();
+        // The following environment variables are expected to be unset so that their default values are used.
+        let env_vars = vec![
+            OTEL_BLRP_SCHEDULE_DELAY,
+            OTEL_BLRP_EXPORT_TIMEOUT,
+            OTEL_BLRP_MAX_QUEUE_SIZE,
+            OTEL_BLRP_MAX_EXPORT_BATCH_SIZE,
+        ];
+
+        let config = temp_env::with_vars_unset(env_vars, BatchConfig::default);
 
         assert_eq!(
             config.scheduled_delay,
diff --git a/opentelemetry-stdout/Cargo.toml b/opentelemetry-stdout/Cargo.toml
index c3e9a25198..851fd70972 100644
--- a/opentelemetry-stdout/Cargo.toml
+++ b/opentelemetry-stdout/Cargo.toml
@@ -24,7 +24,7 @@ logs = ["opentelemetry/logs", "opentelemetry_sdk/logs", "async-trait", "thiserro
 async-trait = { workspace = true, optional = true }
 chrono = { version = "0.4.22", default-features = false, features = ["clock"] }
 thiserror = { workspace = true, optional = true }
-futures-util = { workspace = true, optional = true, default-features = false }
+futures-util = { workspace = true, optional = true }
 opentelemetry = { version = "0.21", path = "../opentelemetry", default_features = false }
 opentelemetry_sdk = { version = "0.21", path = "../opentelemetry-sdk", default_features = false }
 serde = { workspace = true, features = ["derive"] }
diff --git a/opentelemetry-zipkin/Cargo.toml b/opentelemetry-zipkin/Cargo.toml
index d87a84b089..89097670ad 100644
--- a/opentelemetry-zipkin/Cargo.toml
+++ b/opentelemetry-zipkin/Cargo.toml
@@ -37,8 +37,8 @@ serde = { workspace = true, features = ["derive"] }
 typed-builder = "0.12"
 once_cell = "1.12"
 http = { workspace = true }
-reqwest = { workspace = true, optional = true, default-features = false }
-surf = { workspace = true, optional = true, default-features = false }
+reqwest = { workspace = true, optional = true}
+surf = { workspace = true, optional = true}
 thiserror = { workspace = true }
 futures-core = { workspace = true }
 
diff --git a/opentelemetry/src/lib.rs b/opentelemetry/src/lib.rs
index c6753174fe..2e125817ab 100644
--- a/opentelemetry/src/lib.rs
+++ b/opentelemetry/src/lib.rs
@@ -96,9 +96,15 @@
 //! The following core crate feature flags are available:
 //!
 //! * `trace`: Includes the trace API (enabled by default).
-//! * `metrics`: Includes the unstable metrics API.
+//! * `metrics`: Includes the metrics API.
 //! * `logs`: Includes the logs bridge API.
 //!
+//! The following feature flags provides additional configuration for `logs`:
+//! * `logs_level_enabled`: Allow users to control the log level
+//!
+//! The following feature flags enable APIs defined in OpenTelemetry specification that is in experimental phase:
+//! * `otel_unstable`: Includes unstable APIs (enabled by default).
+//!
 //! ## Related Crates
 //!
 //! In addition to `opentelemetry`, the [`open-telemetry/opentelemetry-rust`]
diff --git a/stress/Cargo.toml b/stress/Cargo.toml
index a6383a7f6a..bfeef7e938 100644
--- a/stress/Cargo.toml
+++ b/stress/Cargo.toml
@@ -33,7 +33,7 @@ opentelemetry_sdk = { path = "../opentelemetry-sdk", features = ["metrics", "log
 opentelemetry-appender-tracing = { path = "../opentelemetry-appender-tracing"}
 opentelemetry-stdout = { path = "../opentelemetry-stdout", features = ["logs"]}
 rand = { version = "0.8.4", features = ["small_rng"] }
-tracing = { workspace = true, default-features = false, features = ["std"]}
+tracing = { workspace = true, features = ["std"]}
 tracing-core = { workspace = true }
-tracing-subscriber = { workspace = true, default-features = false, features = ["registry", "std"] }
+tracing-subscriber = { workspace = true, features = ["registry", "std"] }
 num-format = "0.4.4"