The CX-2 (any of the electric co-axes) is only an airplane.
With no throttle curves or pitch curves to worry about, just get the pitch and roll responses correct with dual rates and expo.
Any drifting in yaw can be diminished by adjusting the speeds of the rotors.. getting both of them to start at the same time using the proportional control will help, but the battery drain as the flight goes on always makes the thing drift in yaw.