Agreed about the melees. The way I look at it is the hunters should be a quicker melee with reduced damage (promotes close quarter style gun play). Warlocks should have a ranged one without granting a shield on hit (kill would be fine). Titans should have a really slow but incredibly powerful melee with medium reach, not as long as warlocks but further than hunters. If the melee is charged, it should be a one hit kill. This wouldn't be OP because how strong shotguns have become.