I think class homogenisation was a bad ideea.
The reason is that even if all the classes will be 90% similar guilds will still make a rooster to try an get every single class and spec in the raid.
Why? Because you never know when they will make a boss where a class is better then others.
Rogue - Yog+0
paladin/priests-> bosses that hit more then the tanks hp
And so forth.
Personally a better way to do the bring the player and not the class would of been to actually remove boss abilities where you MUST have a class.
-Leotheras the blind (needed lock)
-ilidan needed warrior