Setting gimbal camera to manual will force movement control to auto. Atleast in VR the controls don't conflict and this is rather unexpected. Using flight controls and using weapon modules is perfectly well supported. With tanks taking control of the gun doesn't forfeit the control of the wheels.

If helicopter controls didn't conflict I would suggest having zoom at right hand joystick. If zoom is added checking that flying and seeing can all be done if desired would be cool (scuh as having zoom as right hand roll).