Thats not how it works at all. It's simple if you get 3 medals you get some type of reward, if not you get nothing. And honestly if you don't get 3 medals you don't deserve a reward. I get 3 medals almost instantly.
Carnage now dominates the other specs kinda like anni did. You do such massive damage now, it really is kinda op. Plus you have so much utility. All the roots and the speed help your team out a ton.
Marauders have always been godly 1 v 1 though. 1.2 just makes that even more clear now that damage has been increased globally thanks to the expertise change. The real issue is the fact they buffed up certain skills far too me.