FADEC along with the likes of the G1000 is the way its going to be. It does seem mad that you buy a new aircraft with throttle, mixture and propeller controls, which you have to adjust manually (twice) for different phases of flight.
Its got to be better for the engine to set take off power, pull the leaver back to cruise climb, then enroute press the "best economy" or "best speed" button and let it get on with it.....