With this design one could replace two high torque servos with a single. You are not purchasing an extra servo and it's connection hardware, you also use less energy during flight get more speed and more torque for your trouble. You wont have pots to go bad, plastic cases that distort under load, micro gears that wear and develop slop, the list really does go on.
The servos design as we have today hasn't changed in 50 years. It is time.
Regards,
L