You can use the waypoints and controll the turrent to engage targets, but there is still the unability to set a flight speed.
Another problem that causes this issue is the unability to use the cyrcle waypoint on uavs.
I want to controll the uav on myself to be sure that it doesnt make any shit and just that what I want because I know that the AI in ArmA is slow and buggy. For example during the fight I cant wait for the darter that it lands at my position with the waypoint and i can pack it on my back. That does take to long.