the real threat in champion+, a part of what its already stated, is the rng god. Sometimes you can have the best team, but rng spawns combinations of events (specials/boss/horde) that will wipe you no matter what. I would like to see an increased difficult in other terms, and not in how many specials pop out.
I had a terrible set of games and teams yesterday, but really good teams today. I think it’s a bit to early to call for a terrible state, it really depends on your luck. And sometimes even the best teams could fail given some unfortunate events and few otherwise negligible mistakes. Just don’t let bad days let you down!