I don't know any other way to say it except you are just flat out wrong. This is the procedure agreed to by all parties in the Transition Agreement:
For brevity sake, I omitted the criteria since the company did not reject the list. ALPA Merger Policy was followed to its conclusion. The Airline Parties accepted the list. Done. Over. Finito.
There is an integrated list, it is the Nicolau list. This whole proposal concept was over when the list was accepted, it was not a proposal it was a fait a'compli. In order for the list to actually be used for bidding, vacation, etc. you have to have a JCBA, but a lack of JCBA does not mean there is no list.
Seham already lost his first DFR. That case was deemed not ripe. He didn't win, it is just the case was not deemed not yet ready for adjudication. Everyone else recognizes that there is an integrated list and it is the Nicolau list. USAPA is as free as any union to attempt to change their seniority list. It is a very tricky prospect due to the zero sum nature of that effort.
If this comically stupid legal concept was really workable, then every seniority integration would just amount to the labor group with the most employees being allowed to dictate the terms of the list. The East pilots are not the first geniuses to think up a novel concept, they are first people duped by a slick talking legal team into wasting their time and effort on this fools errand.
If you haven't noticed, LCC is now being parted out bit by bit. There is no long term future for this airline there is no one willing to merge with this train wreck of an integration. USAPA has failed their pilots and continues to fail their pilots. I don't really see any path forward, the damage is too deep. The one thing USAPA has done is shown everyone what a complete failure their strategy is and no one wants to repeat it. I doubt that is much comfort to the pilots whose careers are being wrecked.
The courts have held the majority can't do that simply to advance one group over another but legally USAPA is just adopting another proposal in an ongoing an uncompleted contract negotiation. However, there is legal precedent for changing seniority list as I stated above. It involved retroactively changing the seniority list so less tenured employees would be laid off first. The court found that using longevity wasn't advancing one group over another because the same criteria was being applied to everyone and it was within the wide latitude for union members with less time to be laid off first. That is the funny thing about longevity, it just isn't a pluck out of they sky, it is the basis for almost every labor union as it became the objective measurable replacement to meritocracy.
When USAPA became the legal signatory, you may as well just insert their name where it says ALPA. Until there is a contract it is a "proposal". Just as any other proposal being negotiated in the course or reaching a joint contract, it can be retracted, renegotiated, and passed numerous times as long as the conditions and restrictions meet the criteria within the Transition Agreement. Even those can be changed through negotiation between USAPA and US Airways and through membership ratification. USAPA has already negotiated a change to the West contract and had it voted on and approved by all MIGS, East and West. Funny that US Airways let East pilots vote on the west contract. Oh, that right, East or West, all members, agency fee payers, or objectors to USAPA, the only collective bargaining agent, lawfully elected through the NMB process. That is the law and obviously US Airways understands that or they wouldn't have allowed USAPA to alter the West contract.
The 9th articulated these points within the majority opinion. There were no review of the merits of the trial, because the lack of jurisdiction negated the fact the trial ever took place. It begs the question why several of the key arguments were commented on by the majority. What Nicalou is(Seniority proposal arrived through internal union process), what USAPA responsibility is("Good Faith"), and citation of the preeminent SCOTUS case where DFR and "Good Faith" obligations were defined. If you were to ask one of your mighty ALPA lawyers in private, they would tell you the majority was commenting and clarifying some legal standards and how the 9th Circuit views them if a similar cases should find itself in front of another circuit judge. Clearly the intended audience wasn't USAPA. USAPA from what I gather always held that it was an ALPA created "proposal", consequently the same argument Jeff Freund(America West Merger Counsel) argued in D.C. federal district court. USAPA has always said it intends to bargain in "Good Faith", a defense it tried to present in district court, but a definition arrived out of a SCOTUS trial, that the District judge wouldn't instruct the jury on. Lo and behold, in their published opinion, which is now 9th circuit precedent, they make sure the definition and precedent is included. You can ignore these things and it won't cost you a penny, but the Addington plaintiffs you obviously go to bat for have paid a pretty penny, or have a pretty bill that is still running. One they are funding on both sides but keep on giving them poor legal advice. You are probably helping USAPA by encouraging them to waste money and senselessly beat their heads against a wall. If the 9th had to review USAPA's other 4 complaints in the appeal, venture to guess based on the District judges handling of ripeness, how they would have been ruled on? If I were a betting man, I wouldn't be taking a bet on the side of plaintiffs. It was clear that the judge in the District Court made rulings from ripeness, evidence, to the argument defense could make to manufacture a result. I would be leery of anyone hanging their hat on anything out that trial.