In that post I try to help developers and I hope they hear me.
SOUNDS: I consider that ambient sound works aint correct. I explain what i mean: whole sound system is right but once survivor entered in room or building sounds not change. Thats confusing players. I think ambient sounds may come more quieter. May be when doors is open, sounds may be louder but not much like outdoors. Like invisible area which entrance means quieter sounds or other values.
Second thing what confusing me is sound of sneak walk - on SHIFT button. I think that too louder then should be, hearing by the enemy. I should hear sounds what i deal, but not other survivors when I crouch and SHIFT toggled. On standup position with SHIFT it can be louder, but this need a detailed consideration. And I ask you to remove sounds what becomes from nowhere. Not real sounds, just like rasp of wire netting when I stand on afield!
Next comes up more like wishes...
OPTICS: I suppose that optics attachment who having a LENS system should zoom ONLY area of LENS SYSTEM, not perspective! This method using many games, like “Insurgency” for example on sniper rifles. But this method is right.
EXPLOSIVES: I hope you add to game some granades and maybe something like CLAYMORE or some kind of mines.
Probably you already working on some of my offers.
WEAPONS: Id like to see in game - LEFT handed weapon and RIGHT handed.
MATERIALS: In game should be materials which possible to shoot through them. Some kind of mat’s of wood, thin metal lists, etc.
That few things can do the game more interesting.
And I just thinking about a FEATURE that make possible players to paying for head of the other player who kills without warning. On servers should appear many headhunters )))) of course its need to consider carefully... That’s is your job.

Sorry my bad language, explaining how I can, I am russian, hope you enjoy. If you like my propositions I have a tonns of my pretension to that amazing project :)