[strictlypersonl]

Loss due to the offset of the pedal to the pivot bearing support in the frame is negligible. It's all pivoted in needle bearings - very little friction. All the components are stiff enough that there is very little lost motion (and that wouldn't translate into a loss of efficiency anyway).

You can change master cylinder diameter, but there is no such thing as a free lunch. Easier pedal > longer throw for disengagement. You always have to translate the pressure plate force/distance into what happens at the pedal.