Hold on so we have a unit that has infinite unmissable aoe scaling standard attack who is able to heal itself by the thousands with each attack even when is not dealing any damage to inmune to ninjutsu units, mostly inmune to chase with *l round mystery with crazy splash damage.... and the problem is Zetsu. Really?

Right, proof of it is that everyone is using Zetsu in their teams, oh wait they don't, they're using that other unit nobody seems to want to balance just because they can easily abuse using it :)