With respect to the usage comments, we might indicate that they are optional and only necessary if the definition does not provide all of the needed information about how the term should be used. I don't know how to say that in a way that is not too wordy and suitable for a form.
A lot of this content is in the FAQ, which was created primarily for the latest public review. We should have a strategy for merging and placing this material. Best in an .md file for consistency probably. Recommendations welcome.