I still think more time should pass until we all can judge things properly. People didn't really have time to develop strategies yet. The armor is a little high on the Sunbreaker. He should go down when sniped with a high impact sniper or a golden gun shot. Other than that I think it's ok. I might main a Titan but I haven't used HoS a lot in PvP so far as the bounties required me to use Striker and now Defender. When I face a Sunbreaker at the moment I try to get away of I keep jumping.