Something absolutely needs to be done about these. I'm all for a challenge, but I think the battles from level 7 and onward are far too powerful for the level they are intended for. There's no real skill involved in getting lucky enough to kill all the opponents before they get a chance to attack.
I've completed them prior to update, went back to see just how bad they have become and it's a disgrace. Gonna have a lot of PO'd newer players when they finally arrive there.
Evil will always triumph, because good is dumb!