Party variants are meant to be different not stronger than all the other character in general. For example, computer scientist has crunch mode which is a very nice feature that rewards getting on a kill streak by enabling a thermal view alongside increased speed and hp. However, its primary weakness is its fire rate, lack of aoe capacity, and the fact that it is high risk high reward class. This doesn't change the fact that it is still very much a viable character if not oped in the right hands.
My point being that you should be wanting any variant to domiant one another because you'll end up with another rose situation where people just monopolize on one class and nothing else. This leads to people complaining on forums and ultimately a migration away from multiplayer overall.
Anyways that's just my view on things, have a good day.
