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

[Massterchef]

mnk, your dps was lowest on that last try

mnk, "yea, I was marked 4 times in a row, went almost 30 seconds without GL stacks"

"sorry, but we gotta kick you"

mnk, "..."

Even with mechanics, there's no reason to be the lowest DPS short of poor gear or deaths on MNK. That being said anyone that would kick for low DPS is probably already parsing and knows how you rank according to everyone.