[RC-Monster Mike]

Sometimes mid air control requires a fairly quick thottle stab to get the front end up - 100% punch control inhibits the ability to do this. I hate to call you out, doo540, but I doubt you can do a standing backflip with 100% punch control on any "normal" vehicle setup - the throttle delay/ramp time will almost certainly prevent this from happening. A short wheelbase vehicle with large tires may flip on its lid, but I just don't see a standing backflip happening.
Punch control is useful for limiting amp draw and softening acceleration, but I find that it creates a "muddy" throttle feel in the mid to upper throttle range - timing on a track suffers in my experience.