After playing some multiplayer, I always find myself being in air assault scenarios where helicopters need to deploy a squad or two in a quickly manner and then move away from the area.

This is usually done by slowly and awkwardly landing the helicopter on an area with no trees or buildings, with almost no tactical freedom to deploy units where ever you want like rooftops and forests.

Helicopter rappelling should be an option for this kind of operations. {F18335}