What about some kind of throttle rudder mix where it progressively adds a set percent of the motor with the rudder if the throttle is set at zero. It would help with drives like waterjets or anything with vectored thrust thats ineffective at steering without some thrust from the motor. you could get into the scenario with a water jet where you cut the throttle and turn to avoid something and nothing will happen, it will just go straight on since your essentially cutting off the steering with the motor.
essentially this in a parameter