Thus why if I had my wish we would reverse the change to the banker, and give them the right once again for them to personally control all food transfers in the realm.
But if the goal is to control their power, then make it a requirement that the Lords are each able to personally choose whether they want the banker to have control of "their regions" food or not.
I would guess the real reason the Banker was changed is because it makes little sense to have a element in a multi-player game that requires the interaction of a single player in each realm.