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

[FrejyaAthenes]

I did say it, any party leader is well within their right to remove a player that is not playing to their standard.
In the case of healers and tanks it's obvious, with DPS it is not, this is where parsing comes into play.
Why don't you petition SE to also remove the party list from showing to anyone but the healers so nobody knows that they're not healing? or hide the enmity list from anyone who is not a tank?

Ideally isn't that there to let the other party members know when to pull back a bit? Least that's what I've done. I mean, I get what you're saying, but that sounds like more of a detriment than not having a dps meter.