Chance of getting BFS base straight away is slimish, however Jet2 get their crews to where they want to be ASAP. Same with Command, the likelihood would be that you would move away, but again you would get back to BFS quickly.
The type-rating is bonded. If your 737 rating is more than 5 years out of date you will need to redo your B737 rating.
Rosters, usually 10-12 days off per month. Stability was a struggle earlier this year but it is settling back down now as more of the recruits come on line.
General happiness - well you could ask 100 different people and get 100 different answers. It’s not perfect, but where is? The good thing is that it is doing very well, expanding steadily and making money.
we have had quite a few join/apply to join this last few months, all citing the same reason as you, lifestyle- live where you work.