and also the best facial stuff and resolutions take alot of impact/toll on a gamer's hardware so they have to make it so many can play instead of just a few gamers with the top 1% of hardware.
I'm sorry, but you totally made this up. Facial expression has absolutely no special demands to the player's PC and surely not as outrageous as you hinted.
How should it? There are just premade sets of faces which are triggered, usually in cut scenes.