I always try to play as Russia and i always yell in chat "FOR THE MOTHERLAND!" and then just charge with a fixed bayonet (Of course i die instantly and most of the time no one follows) and i think what they can do to make the most imersive mode is when there is a limited spawn and when you run out of lives then you go to a screen with you soldier's hat or helmet on the stock of his gun and his gun's barrel is shoved into the groud to support it. You know something like this:
. Other than that the game is great and shows a great proportion of what it would have been like for ground troops.