I'm sure that point will come after all the DR and Grievance routes have been exhausted, unless a deal is found before that which is acceptable.
People don't want to be like this, it sucks to be constantly stressed out not knowing what tomorrow is going to bring that changes signed agreements of yesterday. It does, however, seem that we're hosed either way. Don't cooperate and you get hosed (GK letter after SIA 1 was turned down). Cooperate and you get hosed (717 deal after all the promises both verbally and in writing in SIA 2).
Based on that, there doesn't seem to be any reason NOT to file these disputes to try to get back some of what we negotiated and which was agreed to that has been taken away.
As I said before, I don't think you guys would be reacting any differently if the shoe were on the other foot. In fact, Steve Chase's actions only go to prove that you WOULD. Hence the firm enforcement of the 1/1/15 date when management makes hints that they might not make the date, so you can be sure to capture all the CA seats. SC's email was very clear that you would use every avenue to enforce the 1/1/15 date for that very reason, regardless of what the company wanted.
We're simply doing the same thing. Using every avenue to enforce the deal we negotiated. At this point there's no compelling reason NOT to. As long as the planes get flown and the company makes money, the no-furlough clause remains in place, people keep transitioning, and we all keep moving down the road to becoming one, big, happy family.
The Great Pumpkin is coming! GOOOO Cowboys!

(in other words, enjoy your life, it goes by awfully fast, and stressing about this won't make it all be done any easier or faster).