I don't know about Aero -specific FBW throttles, but you will probably find that the pedal site is measured by ascertaining the difference between two potentiometers, one running 0 to 5V and one 5V to 0. The ECU will map these voltages to specific pedal sites. It is probably set to ignore small variations or differences in voltages. Beware that if you get someone to remap these, you may well end up with a very sensitive throttle.
It is a standard feature of most FBW throttle systems these days that they don't permit fast throttle blipping. it's bad for emissions and not necessary for smooth changes. Unfortunateley it does have some significant side effects liek slow throttle response.
But I find the compensations more than enough. I get over 200bhp/tonne out of my 4/4 and 38mpg, so I'm happy to give up a bit of throttle blipping!
