Not sure if these have been noted (or even if the Dev's still drop in here) but thought I'd mention them:

1: Weapon sight picture - When you stand its rock solid. When you crouch it has a small amount of sway! Should be the other way round or even better. Largest amount of sway when moving, Less when standing still and smallest amount when kneeling. Adoption of an ability to rest agianst low walls, over furnture, etc (ala SQUAD) would be great!

I would like to see implementation of fatigue as well - nothing too mad. SCUM/SQUAD does it quite well as does ARMA but havent played that in a loooong time.

I also would like to see a "hold breath" mechanic.

2: Bino's. At the moment if I use binoculars on my 29" monitor it only has a black mask for about half the screen. So you get the optic in the center surrounded by about 4" of the mask then the rest of the screen is showing through.

Cheers