I'm still trying to figure out what someone going AFK on a boss or dying repeatedly has to do with class knowledge.
All classes have to avoid the same AoE's. Knowing your rotation better isn't going to save a bad player from dying to something stupid.
No. It's fine the way it is. You're still going to have idiots no matter what content you're running. And for those complaining about people not knowing their class, 1) the whole system of allowing any class makes this not necessary and 2) this was already happening with people who leveled through fates so it's not much different.