Nevertheless, I believe that the option I proposed should be added. Since even I don't know the function of each permission, I have to look for the description in third-party sources. If you add this feature the server setup will be simplified to a few clicks.Well until a menu like this will come up it will take some time.
but I'm having already an option implemented to hide not needed permissions for channels & channel groups
I'll also add a mode where only permissions which are actually assignable will be shown.
So the user does not get confused by permissions which does not matter