I believe that the most unimmersive aspect of the game that I've seen so far is the turrets. All of the guns look and feel really great, but the turrets don't feel as good as they should in my opinion. They should be way louder, such as how they are in Metro Awakening. And the crosshair should be taken out, since there's no crosshair for other guns so it doesn't make much sense to have one for the turret. If it needs aim assistance, an iron sight would look way better and wouldn't take out immersion.