Fast roping and repelling would do wonders for the game. In some cases, landing a helicopter and unloading guys takes too long and leaves the helicopter vulnerable as well as the mob of men who have just exited the bird. Fast roping allows for the men leaving to gain some spacing between them and the bird (i.e. So if the helicopter is hit with AA, the guys on the ground won't die right away). Another feature is repelling. This could be for both upward and downward repelling. This would just add a new level of tactics for combat on all fronts; from repelling down the hospital or the castle to climbing up the towers at the solar plants. These features are a must if realism is what this game is aiming for.