Actually, I agree with Richard since the lack of DPS feedback is a huge factor in why I don't like to play DPS. I was there.

It's much harder for a "bad" tank or healer to make it to high level play since you can't easily carry them, and, as Richard said, we do the same stuff at level 20 as we do at 70, just bigger and fancier.

A DPS player can go for ages under the impression they are doing fine! You'll have a DPS that has a rotation they feel is good and are getting by no problem only to get to EX and be told that everything they do is wrong.

"Your opener is missing, your rotation is wrong, it's your job to stun, why are you using that skill, why are you so bad?"
"But I've never struggled before."

This might be a part of the unending issue found with the over abundance of DPS players, since DPS seems so easy.

I'm anti-parser, myself, but I've of the opinion we need the hall of the novice to have an "intermediate" or "advanced" hall set to talk about those things.