I don't get why dps should get a free pass for sub-par performance. We already have easy to judge metrics for tanks and healers; If a tank isn't holding hate and a boss cleaves and wipes the party, that tank is going to get kicked, sometimes first time sometimes after they've done it repeatedly. If a healer isn't keeping the party up or is dropping the tank on a regular basis that healer's going to get kicked. Imagine a ravanna farm party where the either the helaers lack of heals or the tanks lack of aggro caused wipes.... The party responsible would definitely be booted or people would leave, and it's totally understandable. A mnk pulling 400 dps though? Totally acceptable because dps isn't something we're allowed to judge. It all comes down to the same thing, if you're going into something in a particular role, you have to fulfill that role.