As shown above at a lot of two story buildings you can see the "footsteps" of the player models (enemy and friendly) above you - which helped me a few times to locate the enemy and kill him. Those two dark black circles move with the player model. Think it should be fixed asap.
Next thing could you please make the bushes at least a bit more "lifelike". When you touch them make a shrub sound, maybe they slow your speed by a lot 50% or more, disable the ability to crouch / prone inside or at least make the outer side of the bush walkable and stop only getting in the middle of it? https://serving.photos.photobox.com/689354905793528a8d825bf061855e87d8da9ae7de029cdeefb863904492f56df1ece6a3.jpg Something like that?
And could you make the player model on the select gear screen holding the gun more realistic? Like: https://i.pinimg.com/474x/07/8b/25/078b2576821c702faf79eede5e18f8fb--firearms-zombies.jpg
I just find it very awkward to watch the hands position at the current models.