Any good plugin will almost always have things that it could do that it doesn't right now. Rather than keeping those internal it seems like a good idea to put them out there for discussion or at least so you know what might be coming. That way if this plugin looks like it does almost what you're doing but you know it's going to do all of what you need in the future you can get on board now. Also please feel free to request features!
- Create a settings page option to limit which users can maintain their own groups. Sometimes users might be subscribers and shouldn't be able to add themselves to an admin-like group (for instance).
- Add filter/sorting options to the listing of users on the group maintenance page for sites where there are hundreds or thousands of users the current inputs would be difficult and frustrating.
- Add filter/sorting options to the listing of users or groups on the post maintenance page. Even once groups are setup maybe there are lots of groups or some posts just require the setting of users individually. The current method of sorting just by name might get majorly time-consuming on sites that have lots of users.
- Add logic to the post maintenance page to make sure that at least one user or group has access to the post
Have an idea? Submit it using the Support menu option and I'll let you know about getting it added!