Revamping the system is a large ask, and while it's on the to-do, it is not on the very top of the list.
That said, we do recognise that the community very much wants this functionality, so it's not at the bottom either 😉
Is there a centralized permissions system? If not, there should be.
A lot of plugins have really simple ACP pages that are often just picking what groups and users have access to certain things.
@julian Is there one? I'm gonna submit an issue on Github if not.