Id also say that the Aim assist has gotten a hell of alot stronger because people are actually tracking me with their aims when I slide past them, its like the game swings them around to cope with the fast movement.
But as I said it just seems to have changed in some kind of way that I cant quite put my finger on yet and is there and reason to use an assault rifle besides the Scar? the Grendel is fairly inconsistent with the hit detections and I havent unlocked the scarab yet.
Those are just my thoughts on the multiplayer.