Seriously? I used to have that battler in my project, Destino Temps, as a faceset, and I'm sure I got it off a japanese resource site, so I doubt Blizzard created it himself.
Anyway... There's too much contrast in the frame, try makin' it more equivalent. Also I dinnae like the red part, try to make some sort o' pattern or texture on it. The rest looks fine to me, system sets dinnae have to be all that detailed.