My complaint is with turning things that used to be considered extras into the entire core game. Kick ass combat used to be an extra. Detailed and complex NPC interactions used to be an extra.
If you took those two things out of Mass Effect 2, what would be left?
Sorry if I sound bitter, but the RPG genre has been dying since about 2000 and I hate to see people who claim to be RPG fans helping it into the grave.