I'm sure someone will correct me if I'm wrong, but I think this is what's happened in previous franchise changeovers - only the upper management change.
Yeah I would be under the same impression but was unsure if First would bring in there own senior staff from there existing franchises and intergrate the new staff into the established franchises like FGW.
On a separate note it'll be interesting to see how they refurb the 390's given that some of them eill be less than a year old when they get the keys. Would like to see if they gut them and install the high back seats like the HST's in order to create more space or will simple recover the existing ones. I'd certainly hedge a bet on the 1st class sections being reduced along with the replacement of the shop with a buffet type set up. Would make sence to gut the front 1st class coach of its kitchen, install more seats, do the same with the shop and then take a 1st class coach and turn it into a buffet/kitchen vechile...makes sence in my mind at least although happy to be proved wrong!!