I feel the same. I think WoW has become the epitome of generic MMO and that the RPG of MMORPG is just an afterthought at this point. We're just generic heroes, who all can do it all. Our role is generic now too, you're either Tank, Healer or DPS, not specialized like it was back in the day. Sure, they play slightly differently, but that slight is not enough to classify it as different. Gone are the days where you brought a Paladin tank because they were amazing tank healers; you brought a Druid for the HoT's they were able to dole out; you brought a Shaman for the AoE healing; or a Priest for the damage reduction capabilities.
When we're all relatively the same, the differences really are nothing but fluff.