Simply having a screen, where you can shift governors from town to town in X amount of turns would be the easiest solution. There is no need for us to have to do manually or even semi-manually (with the auto move). Select governer who is in City A, select city to transfer governor to, governor disappears and reappers in City B after X amount of turns in transit. Problem solved. Realism here is a moot point. Shifting governors around all the time adds nothing to the game. It's really a matter of convience.