Could be worse
Just to add my thoughts. Whilst it would be great to get full pay throughout training, I did four months months without any pay with my current lot whilst doing the TR, and in month five earned about £400 for a couple of office days we did.
Just think that's four months I did with zero pay whatsoever. I had to pay for my own accommodation and had to sell my car (a six year old Korean hatchback, nothing fancy) just to make ends meet. So it certainly isn't a Jet2 issue alone. It could be better but it could be a lot worse.
70% would suit me fine if I can get my local base. I currently spend £600-700 on commutting and accommodation per month, not to mention the nonexistent lifestyle. It may be a pay cut (I'm currently 75%) but I imagine I would be better off financially, and you cannot put a price on the quality of life it would bring.
Good luck to all those who are applying.