Are they going to do anything against NS madness??

When the Nightsisters reach the point where everyone has them and they are old-news, they will create a new toon to counter them that prevents revives and mitigates plague. Then everyone will be complaining about this new toon that is OP, kills Nightsisters way too easily, and cost too much money. Eventually, the Nightsisters will be irrelevant again, but, I wouldn't expect that to happen for a while.