If one is taught proper to fly, one needn't worry about "Single Channel Cognition". Comes natural, and that's the idea.
The hands are not the problem, gents, tis the cabeza, and innate skills, with experience.
No one can fly w/o cueing, whether visual or dial. And with sufficient cueing, it ain't even hard....
Let us stop confusing "poor stick" with lack of repetition. Then there will be no need to "Train" for stuff that is not happening.
Sully had "0" time in the sim or real in 320 water landings.
The only resource a pilot will always have and the autos will not, is "Innovation". And that does not atrophy.