Problem is really a few things. I think adding a 5 man dungeon would be a good idea OR they could address root issues.

1. If the tank blows it - everyone knows it. If the healer blows it - everyone knows it. If the DPS blows it... well they might realize it but there will be 2 or 4 of them so blame is dispersed.
2. Since SE frowns on parsers no one gets on DPS's case. If a healer isn't healing well or a tank doesn't hold hate they get blamed. Easy fix... create an in built parser within the game.
3. People are shallow. Oooohh big #s!!!