DPS display could easily be solved with a system already in game.

[Eidolon]

That takes some serious mental gymnastics to arrive at that answer. As I said, no one even mentioned inability to perform tanking or healing roles. How did you even come to that conclusion? This sounds more like: "Oh, someone caught me in a logical fallacy. Might as well go along with it." Absolutely beyond reason.

Because we already see posts of people getting kicked for "Omg tank can't hold threat" and "omg healer let me die." It may not have happened to you, it may not have happened to your friends. But it DOES happen.

There are two times I get a que as in progress for a dungoun.

"Tank was an asshole."
"Tank couldn't hold threat."

I never get repped in on a DPS because "They couldn't do DPS", but this could be my own bias of not playing it as much.