I believe there will be a mix of contracts on offer - 70%/part time contracts may actually appeal to some people. I also believe that COMPASS testing has been canned (no guarantees though).
My recommendation (for what it's worth) is that if you're after a UK based, short haul jet job in an expanding and profitable company that pays you a decent salary every month on time then apply. There is no charge to apply and you can walk away from the selection process at any time you find something you don't like/disagree with.
There are a few folk on here that have a perma-moan about Jet2 - that's fine, everyone is entitled to their opinion. All I would say is that if you're looking to make a career move/change then apply.
If however your time is too valuable, your skills too great and your minimum acceptable income too high then I'd suggest you get back in touch with BA and take them up on that offer of DE Chief Pilot they keep bothering you with.