"Perhaps augmented stability should be provided electronically."
Perhaps, but i am suggesting a method that is mechanically simple and has already been proven in the Lockheed CL475, 186 and Cheyenne. An aerodynamic variation was developed at Hiller, and all electro-hydraulic systems are based on the same idea of gyro feedback for attitude control.
"In addition, perhaps it should only be considered after all viable aerodynamic methods had been implemented."
Again perhaps, but i have not seen anything so far that leads me to believe that hands off hover can be achieved purely aerodynamically. The original De Bothezat heli had four rotors, with dihedral, and even this was unstable. I'm actually puzzled why you are so resistant to gyro-aug, when you were argueing for the gyro stability of intermeshers. I'm suggesting a simple way to achive one of your objectives, allowing greater freedom of design for aerodynamic efficiency.
Mart