I have just thought of the idea of maybe having the ability to whisper or shout in game. Maybe if u don't have a radio or that you must do it for tactical reasons. This would improve the realism of the game as people wouldn't talk to each other on their radios when they are two feet away from each other. This could be used especially for the resistance (if there is one) as they would not all have radios for everyone on their helmets like they do on OFP1. Voice communication like this could also bring more atmosphere like shouting FIRE IN THE HOLE! When u pop a grenade in the enemy's base or even TAKE COVER! When you’re naded or bombed.
Basically, OFP2 would be much more atmospheric and realistic if the use of shouting and whispering was used. This would beat other more scripted games like Call of Duty since their commands are scripted unlike my idea is that they would be used to give unscripted commands.