One thing i've noticed about delegate is that if I put two delegates in a city, the radius bonus doesn't increase. For Example, if I have 1 delegate in Hamburg, and the bonus is 3.4 at 100km, and 1.4 at 200km...if I add a second delegate to the same airport, the bonus remains the same - in my mind, it should increase the bonus (not sure by how much), and it should be a touch cheaper per delegate (as they can "share" offices).