Weapon sway is largely exaggerated in the current version.
All players largely agree to the fact that it is very frustrating and many have reported this issue here in manners that are less than fully analytical of the issue at hand.
With this in mind, I figured a report about this issue that is not offensive to the reader was in order.
The core of the matter is: Weapon sway is overscaled to a cartoonish degree - it is nigh on impossible to employ any tactics that rely on even minimal mobility whilst retaining any basic accuracy of fire at medium ranges.
In CQB scenarios, the issue is even more severe. With the typical high-mobility engagements of wall-to-wall fighting, the AI has an absurdly unfair upper hand.