If they want to play by the fare rules it's only fair... However they miss out on an incredible amount of good-will by not accomodating these changes when the plane is half-full, and as well it doesn't cost them a penny to do that. Staff may be under specific orders not to be flexible anymore hoping that business passengers will buy flexible tickets ??? If that is the case it is probably another false economy saving as those passengers may be likely to fly another airline which is a bit more flexible...