How far is aim assist supposed to help you? Theres been a few times in kill cam where I watch someones rifle not just nudge to where I am...but actually follow me inside the builing as I ran downstairs..planted a claymore...ran back up...fire at sopmoen out the other end of the building...then to the balcony where I was comming out where he kills me. Even though there is no way he can see me he follows the movements percfectly.
There has also been time where I watch people actually following peoples movement who are underground comming up nearby passages. Seems like the are able to see through the ground.