I dont think so there are so many other overpowered ways in this game that i actually think jinzo would be average.
I just want him because he's my favorite card since the beginning beside vampirelord who seems pretty weak in this game :)
The only people who complain about Jinzo being too strong is just P2W scrubs that rely on their triple Mirror Wall. Its still has a lot of counter: econ, OtC, Ebola, Relinquished, WildTornado + Storm.. do I need to go on?
yeah and let's add (sarcastic one) raigeki, mirror force, black whole, drop off, delinquent duo, monster reborn, call of the hunted, cyberjar, morphing jar#2, d.d. warrior (and d.d. Lady) judgement, oh and harpies feather duster. then duel links will be balance.