He is an excellently designed card, in a low base attack, no DR clan. If he is so OP, then what would you recommend to balance him?
From what I saw last week on my way to the 10 credits, mono Piranas were quite a popular choice. Parmabarb has proven to be a very handy 2*, without which they're brought back a peg. It's quite normal for strong-but-(debatably) not-ban-worthy characters to be voted out just to reduce the frequency of that week's overplayed clans.
He is not ban worthy. Players just piss their pants against pillz manip heavy hands, overcompensate in their panic, then blame losing on a one trick pony.