It's all a major sticking point with management. Transition! Must go to PBS! Ok, now it's dropping/trading! And scope, can't possibly put scope in there! And and and and. Look at the company's last proposal and you can easily see how long of a list of items they will claim. Leaving scope out totally tipped their hand, that they still have no intention of ever coming to a satisfactory agreement.
They're going to cry that every single thing is absolutely critical to the business model, except having pilots who are happy to stay here. Remember, less than a year ago their investors slides proudly claimed the junior nature of the pilot group was a major driving force in the business model. Just because it's not in the slideshow anymore doesn't mean they're not still counting on the pilot group remaining underpaid and comparatively young.
Without being permitted to strike, the only options are to suck it up and take it while hoping for ALPA to come up with a miracle, or vote with your feet when the opportunity arises.