this is a suggestion for something simple but pretty needed everytime:
Allow drag & drop ordering of field groups. Not the items within a field group, but the field groups itself. User field groups, Post field groups, etc.
Reason: to allow users/admins to see the content in the cronology that makes sense to the developer.
It's not very inviting to have to make a php function all the time for some ordering, and make changes through that 🙂
(existing ordering plugins don't handle toolset ordering)