Love the game, very well done.
The only annoying thing is that the quad rotor is controlled like a helicopter. The entire point to fielding backpack drones both in Law Enforcement and military is that you don't need to be a helicopter pilot. They almost all use the xbox 360 controller. Right stick is move forward back side to side. Right stick controls which way the thing is "ponting" the one I used had a default "front" ad the right trigger is up and the left trigger was down. One of the colored buttons was hover and the others were for switching the controls to the camera.
I don't play arma as a flight sim, I along with most prefer it for the infantry combat. Portable drones and robots for scouting rooms and houses are obviously already being used. The key to them being effective is that any soldier / cop can pick up the controller and make it work.
Sorry for the rant, but having to stop the scenario and work on flying drones sucked.