Stock options have a long term investing horizon. The stock is down 40% in the past 4 months. So what. It was up 250+% in the prior 18 months. But again, so what. If the stock is still stagnant in 10 years, then I'll begin to worry. Stock options are only worth something when you sell the underlying shares, and not a single JetBlue pilot is even 50% vested yet. Be patient. If, much later, it looked like stock options were going to expire underwater, I would expect them to be repriced. More options might be granted at some future date, but it won't be because of short term price fluctuations.
And BTW, the handful of pilots who made $250k+ weren't doing it on stock sales. They were check airmen who worked their tails off in the sim, loading up on lots of time-and-a-half. No FAR mins in the sim so they were paid for 140+ hrs per month. There are many more dedicated sim instructors now so that doen't happen so much anymore.