The most likely reason they changed the way the scopes work is because if you take a game like DayZ or even Grand Theft Auto if you try to make it as realistic as possible the game is gonna break in some aspects. So in order to keep this from happening the devs have to tweak a few things even if it is changing the peripheral view when ADS. Honestly I could care less if that’s a feature or not yea it might add some more realness to it but after all, it is just a game.