My point is that deceleration (= negative acceleration) is measured somehow and used as a control parameter in a closed-loop system - eh? Seems like an excellent idea for "performance-driven" landings.
And if it's such an excellent idea for landings, isn't there some thought to the same concept for takeoffs? I.E. some kind of acceleration measurement used to insure that mis-set thrust, TOGW error, dragging brakes etc. don't create a sub-par takeoff?