It would be helpful if choice options could be based on sharepoint lists. This would make it possible to generate user-dependant forms (as visible list items may vary per user). As a forms user within the organisation is always authenticated on O365, this may make this feauture possible.
Scenarios for this case:
Students selecting courses in a form, seeing only their own courses instead of all.
Students selecting partners in a form, seeing only their classmates
Teachers selecting students in a form for support requests, seeing only their own students instead of the whole school