Not sure where you actually going with this though, I mean all roles are capable of doing their job at the moment, and each one is still very much unique. Something like Rampart or tank stun didn't give them special identities, (Rampart was on the cross class system Pre-SB anyway) it's their own toolkit that makes them stand out and each player knows that when they pick a particular role to do content with. Granted the current role system needs some adjustments, but it's not game breaking or preventing any content from being cleared.