I've been trying to quickscope, and I've noticed a few things that are different. When they said they were going to nerf quickscoping, they weren't lying.
First of all, there is almost no aim-assist. I agree that too much aim-assist is unfair, but this is ridiculous. Second, I don't like how there is no quickdraw. By the time I zoom in, someone has already unloaded his entire clip into me. And finally, the bullets appear to be slower. In previous games a sniper bullet was an instant kill as soon as you pulled the trigger, but in this game there is a delay in between.
I also have a minor complaint about the tomahawk, which sucks now. In previous games, tomahawks/throwing knives were good because they were deployed extremely quickly. Now it takes a longer time to throw the tomahawk, which defeats the purpose of the weapon.