I think that's the point of more sway... QSers took advantage of it in past titles, and I'm guessing the sway is there to make it less predictable.
It deff doesn't help anything. Again Focus can calm it down, and it helps if you find yourself in a gun fight where it is not a one shot kill solution( hit markers, or misses). I would think that is the only reason it was added so much, but sway is when ADS, and if you are " QSing", you technically would not be fully ADS. Another hole in the anti QS argument? Who cares, its a dumb argument anyways.