As it says on the tin, enemies tend to be too aggressively dithered out of sight when close. Beyond chainsword length from me? Can see them fine. Half chainsword length from me? They’re half faded out. Punching distance? Absolutely invisible. Even worse on the default super-tunnel-vision FoV, so many thanks for adding that setting back and letting us actually see more than if we were trying to play through a carboard tube.
I frequently see it happening to teammates, too. They’ll have an enemy attacking them up-close, and they’ll just run through/past them without realizing they’re being attacked, then suddenly turn around in surprise when they get hit in the back.