I'd have to agree. I don't understand all the complaining. It sounds like the same "It's all about me!" attitude from "Joe Casual" that has, supposedly, "ruined" the game.
"Let the best man raid!". Isn't that the hardcore ethos? If you aren't needed to tank anymore, then switch to DPS or Heals. If you can't get a spot healing or DPSing, then obviously you just aren't good enough for the job. A more suitable candidate was available, so step aside. Step up your game and try to get on the "A Team" next tier.
I'm starting to think that alot of the "Johnny Awesome" tanks here in the forums aren't really as awesome as they would have people believe. It's been my experience that a good player is a good player across the board. They can tank, DPS, and Heal. Possibly on multiple classes, but at least two out of the three roles on the same class.