Something very small that would add to the atmosphere of those helicopter insertions would be the inclusion of radio chatter as a sound effect. the sound of a radio burbling in the background would to the atmosphere it could be anything from static to murmurings to very clear sounds like team 1 inserting now over.
btw i also like the idea of being able to shoot personal weapons out of certain helicopters like the litlebird if they include it in any of the campaigns same with hueys and blackhawks but the way people are sitting would mean only the people next to the door could mean they can shoot
