I guarantee you when legacy carrier pilots gave scope relief to the regional carriers they didn't intend to see 50% of all domestic flights be flown by them within 10-15 years. Oops.

Why do you think JetBlue changed to Sabre, a reservation system designed by none other than American Airlines? Presumably, they already had a viable system of their own. (Anecdotaly, I'd say the JetBlue-Sabre conversion sucks, but that's only because I think waiting 45 minutes on the phone to reserve a jumpseat is excessive)

Clearly, there is some long-term, strategic planning going on between the two companies. This is not about a few gate changes. It's about forming a domestic alliance. Nothing wrong with that, I guess, but it would have a significant impact on current American pilots. Probably to their detriment.

Accurate tea leaf reading is pretty much impossible, but it is fun.