The main problem I have is how much damage tanky clans deal. For example, Kaguyas hit pretty hard and can be a real chore to kill.
On one side of the coin, this is a game and I don't think it should be GG if you get caught once. On the other side, that's how it is in the Naruto universe: if you slip up, it's over. The former side of the coin is a lot shinier; I know people don't care about Naruto logic.