I have completed all 4 new quests on EE. It's pretty hard, especially terminal. But, terminal is marked as extreme challenge. I'm not going to argue with that one.
This whole new idea of monsters champion is wonderful. It's fantastic system because it's not exactly impossible. If you have CC and a healer in your party, you can easily pull it off. But, the key here is in sudden difficulty increase. I very much hope that turbine think this more carefully before they apply any changes.
In some quests, if you are not melee, you are screwed. I can't tell if this is a good or bad one. You can simply say "just bring CCer with you", but when you get one shotted regardless of your gear and preparation, people get p***ed off (no chance for healing also). So, all in all, let's leave monsters champion alone and talk about their damage dealing. And if 4k damage is really necessery. This should be discussed critically, and not because people are lazy and crying all the time..