It's kind of a PITA to have to manually cast stuff so basic in what you can and being able to autocast minor healing would actually make it useful, same with inflict and the like.
Maybe some sort of check of
(is it a cantrip)
(is it a gsf free spell)
(are you at 100% refund/whatever because of your class feature/ability)
allow it to "auto-cast"
thats it