Currently there is only support for SPARQL 1.0, will be there any plans on supporting SPARQL 1.1?
No plans for sparql 1.1, I'm afraid. That would need a non-trivial amount of time and funds.
SPARQL 1.1 "support" would be quite nice for remote endpoints at least. As I've seen, the remote store also parses the query. Is there a reason / necessity for that? As far as I understood, the complete query is forwarded to the remote endpoint anyway... Couldn't we just "bypass" the SPARQL parser here, and check the response of the remote SPARQL endpoint for parsing errors?