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

[Ghasto]

I suspect you want to see everyones so you can kick people out of groups.

I want to see my DPS compared with the other 3 DPS so I know where I stand, if I'm doing good or poorly in comparison, and if I'm not doing well, strive to improve.
DPS changes on a fight to fight basis because mechanics, knowing only your own DPS is good only for dummy parsing, in a raid setting you should know how well everyone is doing, ESPECIALLY in fights with tight enrages.

and why is kicking someone for being a poor player so frowned upon? I bet you all have kicked healers that couldn't keep up, or tanks that couldn't manage aggro/positioning etc.
Why isn't this applied to DPS?
It's a double standard, one that needs to be addressed, with legitimate ingame parsing.