Not really, since blade dancer could one hit melee as well, easily able to wipe teams given the right timing. The difference I'd say is that hammer is like tiny little FoH where ever you throw, and for PvP your super constantly depletes, though I have gotten 4-5 kills with it in one use. If I had to say something about it is OP, it's that you can eat a golden gun shot mid super and still live, and the cauterize is easily the best perk for PvP ever. Sunbreaker melee kills can heal, grenades heal, and each hammer kill heals as well. Think hungering blade on crack, and that's pretty much what cauterize is.