If flying is all you've ever wanted to do, then I say stick with it. Particularly in view of the fact that your previous employer seem to be doing the decent thing and are having you back in for a chat and a sim check. It's rare to find that sort of commitment from an airline these days, and I must say, I am impressed that easyJet are being so loyal.
Many of those giving their opinion regarding the hedge fund option probably haven't worked in both finance and aviation. I have. Aviation is infinitely less stressful and more fun. I too lived to fly when I was young, but couldn't afford to go integrated and so I saved and did several jobs in finance, marketing and even some bar work. As soon as I had the money to train, I did, and I've never looked back.
This industry is cruel now, but when the flight deck door shuts, it's still the best job in the world, and it's one that I don't have to take home with me at the end of the day.