deSitter:
The control input should match the physical stress of acceleration, because the pilot has to "feel" how to fly the airplane based on what it's doing to his body.
Without wishing to appear too mechanistic, another factor that should
govern design is perhaps the resolution of the shoulder/arm/hand
assembly, which can apply quite large forces full scale, but will have
limited resolution, or granularity, at low force levels. If the initial
force is low, small variations in that force will be difficult to
control, because of resolution limits and signal to noise ratio. If the
initial force is high, then small variations will be much further up the
linearity curve and thus easier to control. If there is position as well
as force feedback, then so much the better. As in mechanics, the human
body has many compound servos, which have limited resolution, response
times and signal to noise ratio.
Not really my field, but isn't this what artificial feel systems are designed
to address ?...