Oh, there you are! Another whine-thread. Teamplay is surely not taken into account here.
Wait, teamplay? Oh, this is a mighty unusual word. And i totally love whine about poor players, poor performance and no teamplay. Sure, if you hit on a tank, supported by two healers, he's unbeatable. If you go alone against enemy sniper, he kills you in two shots.
Why would you blame lvl 50's for your own mistakes?
And one last thing. How comes, that a team usually lacks a healer? Most players want just to dps, or what?