Except snap ups aren't pattern bargaining.
A contract has many different parts, especially the mature ones. Over time they have evolved to meet the needs and culture (yes it's a thing) of that specific pilot group. You ( and Spirit) may want to drop to zero, but Southwest wants more premium to fly high. Delta wanted (and got) a higher DC, FedEx wants a DB that is more in line with recent earning potential. Alaska was worried about little jet scope where Delta was worried about big jet scope.
The way each property gets the things they want is by allocating the total costs the company is willing to bear into the areas that are important for that group. Historically this had worked cycle by cycle. Alaska got $306 (I think?) and then Jetblue got a bit more. Then Delta got a bunch more. Normally, Alaska would have to wait 4 years, which isn't too bad over a 25 year career, and then they would choose to put that value wherever they wanted to put it, whether it be in pay or QOL of retirement. Now, because of the now, now, now/me, me, me stuff (which turns out isn't just a millennial thing) they want their money right away, and build in the snap up.
That's great. I like money too, but the payrate spread of the majors and legacies has gone from 2.2x to 1.4x since 2004. And that's great, assuming every property wants the same things. And maybe they do, but if not, the snap ups seriously weaken a pilot group's bargaining power for the next cycle.