For RTQ and REQ, lack of game experience is a problem. We get players that have very low gear, that have no idea of basic tactics, that have very little game experience. Lots of wipes are caused by green players that should experience more of the game before they join those.
I would suggest to raise the bar to enter RTQ and REQ somewhat. That would give us a more experienced playerbase, both wrt. game time and gear.
There should be a requirement to have 20 boons to enter REQ.
There should be a requirement to have 40 boons to enter RTQ.
Yes, you get can around this by buying campaign completion, but not everyone does that. And if people do, I am sure Cryptic would appreciate the income