If management is a regional structure, they'll centralise. If it's central, then decentralisation will be the way to go. Either way, there'll be more bosses with flasher offices and not much will change at the coalface.
Every few years will see top management move on to other jobs and make way for some "new broom". This will be a Manager with no aviation experience, "but that's not important because he will listen to the workers". His main job will actually be to screw the workers. Once he's done that he will add a new paragraph to his CV and move on to a similar job with a bigger company and nobody will notice what chaos he left in his wake, except the workers at the coalface, who will now be working harder while sussing out the next manager they wheel in. This guy will be a "really good guy", but before long he'll be wheeling out the latest restructuring plan because it's a competitive environment we work in now and we have to be lean to fight off the competition. This guy doesn't really want to do it and he's thinking of the long term future of the company, but the workers will be getting that familiar feeling of being screwed again.