Each of the [Formation] trio must be in the same team to activate. Choji must be with Shikamaru, Shikamaru must be with Ino, and Ino must be with Choji. And to not murder their playablity, they are all Valid.
Gaara of the Desert [Tragic Name] can only use a Wind Ninja to pay for his cost, and his effect can only activate twice.
Inoichi Yamanaka and Ino Yamanaka has a Hand Cost of 1 and can only activate in the opponent's turn.
Kimimaro [Attack From Behind] (I can tell it's gonna be abused soon) requires the owner to discard one card from their hand in order to use his effect, and it only activates if he's the blocker.
There you go. These erratas can make the Ninjas even closer to what they were meant to be like, and stops their splashing and brokeness, while also staying nearly the same in terms of their effects. As for Kimimaro, I have a feeling that somebody's gonna figure out how to abuse him. Either way, right now, once you drop him you pretty much win.
Anybody think these erratas would work.