As an aside, any business which shuts its' website to launch a revamp during the day is idiotic. Have to wonder about their commercial acumen. They either launch it in parallel or flip it in the unearthly hours. Not during the soaps when Joan wants to book some flights on Jeff's credit card.
Clearly the words of someone who has never been involved in a res system migration from one platform to another. It's a process which many airlines have had years to plan and implement (and some have still messed it up royally) and so to be at this point just four months after Flybe collapsed having had an interim system running in the meantime is good going. Even when planned, this process can take 12 to 14 hours to migrate bookings then test and conduct the integrity checks of migrated bookings before going live.
Let's see what tomorrow brings.