As an aside. When easyJet took over Go the transition took 6 months. We were all briefed on the project and the various stages were outlined online and in briefing packs. One month a few SOP's would change. The next would be new uniforms and crew ID's. Following that some more SOP changes and new manuals. The next month the Sim details were changed and postholders transitioned. The month after the aiport signage and livery were changed and the final SOP's were introduced.
You get the picture.
Slowly, carefully and pre-briefed.
At the time there was resentment that the 35 managers charged with the transition process were to share a £10m bonus IF it all happened on time and without major cockup. The main man being Ed Winter (ex-BA EOG and GO CEO) pocketing a million.
I think it was small change for implementing such a fraught and complex task. It was done well and the customers were basically unaware.
So it can be done. It can be done well. It has been done well on a bigger scale than Flybe.
Its just down to management.
Cheers
WWW