I main a titan and honestly think sunbreakers are relatively OP in Crucible (when i play) but i wouldnt say its game break like the health regen is maybe abit too much, however i am an all out PvE player and i love using it for health regen as it helps like crazy! Its just as shame they cant tone it down for crucible but keep it as it is for PvE as it isn't even too great in it, can just save your ass at times which i what i use and super for