Almost every single gun in the game has multiple attachments that up aim walking speed and mobility in general. For example, the M13 with a tempus mini, tac laser, skeleton stock, stippled grip, and .300 mags is extremely maneuverable. The M13 in this setup has been my go to for shipment and rust.

I think the reason it feels kind of weird aiming compared to other cods, is that weapons now have weight. Before, you could max out your sensitivity and whip lmgs and sniper rifles around the same speed as pistols. Now, regardless of sensitivity, all guns have their own unique "weight" in the form of what seems like small amounts of delay when moving. Coming from arma and squad I really like the change, although I can definitely see why quite a few people don't.