I still think you’ll need a hunter to kite Drakkisath.
I still think you’ll need a druid to spam Hibernate in BWL.
You’ll still need mages and druids to decurse, it’s nice that they are both useful as healers in raids in SoD.
Warriors will still be needed to sunder armor.
Rogues will still be needed to poison.
Paladins will still be the most efficient dispellers.
Shaman will still be the most efficient raid healers.
Warlocks will still have to hold back their potential in order to not rip threat, or play the biggest threat generating tank.
Priests will still be the only class with castable absorb shields.
I don’t see where any worry of “homogenization” is coming from.
But maybe I’m an ignorant Troll.