I think that command whitelist should be more to prevent newbies who dont know what their doing use command roles. I understand that a vet who hasnt played is a while would have difficulty in command, but I think that if somebody played long enough to get a command whitelist before, they're probably responsible enough to re-educate themselves on whats changed since.
Perhaps instead, when a vet tries to play a command role they get a one time popup that says rules and expectations have changed and they should re-read parts of the wiki.