I hate him, but only in the right team, at the right level and only in GW. His specials have the ability to two-shot any of my chars, so in GW, when he is 5* and with protection, I need to get rid of him before I lose someone and he takes *a lot* of damage before he dies. When he's backed up by taunter(s) and a couple of other hard hitting chars, it gets very tricky deciding how to play the fight, or even which chars to bring (do I try to burn down, or do I bring a tanky-healy squad and hope to survive it)
At other times, when he's 4*, or without protection, I can leave him alone without fearing a two-shot, or I can burn him down fairly quickly.
I suspect he's going to get very strong at 6 and 7*.