In terms of gameplay mechanics, old school zoom aiming achieves the same thing as ADS. Is getting to press your nose against virtual firearms really that important in a game about shooting werevolves and vampires?
I blame this on the proliferation of Call of Duty over traditional scifi and fantasy shooter franchises. You can fucking ADS on an assault rifle in Halo now 
myself and many others i know personally would totally have shelled out for some dope elite armor, i wonder if its a smaller part of the player base than i assume or if its also the devs trying to have balanced hitboxes at the expense of cool aliens