This looks like a great addon, except for a couple issues.
Commands. I should be able to use ulx adduser, ban, banid etc
I could learn to use these commands but the problem is other admins. I don't feel like re-training admins, plus, due to habit, seasoned admins will forget and use the standard commands, causing a mess of the bans. For example, ULX Global Ban [0.5] does this. It makes it seamless for players, only the server operators would know of the change.
Also, I think it is preventing XGUI from editing user permissions.
If these issues can be fixed, I will use this system.