So a clever designer ensures that the CoP doesn't vary much and puts the pitch change axis (feathering axis) coincident with the aerodynamic centre of the blade such that the pitching moments, CMo, are zero.
The reasons for having a bigger blade chord will be to do with the critical mach number of the aerofoil, the amount of camber and the need for a sensible rotor solidity ratio based on the number of blades.
According to your logic, having a longer lever (distance between CoP and pitch change link) means needing more powerful controls yet the reverse is true - if your lever is longer, you need less force to feather the blade as your force is acting at an increased arm from the CoP whereas the aerodynamic backloads are always a small distance from the CoP (or even zero distance).
As I said before - utter bolleaux spouted in embarrasment because your initial suggestion that it was the assymetric aerofoil that was responsible for servo transparency was totally wrong.