Well, the question of why USAPA not only agreed to the MOU provisions, but negotiated them is relevant to your question and dilemma. But to answer your question, it isn't a given that East pilots position on the SLI will be muzzled by APA, only that almost certainly it won't be USAPA that presents it, so the dissolution of USAPA in this process isn't necessarily a conflict of interest, it's simply an excuse they are using to remain relevant.

One could argue USAPA (with the support of many East pilots) is adept at promoting and aggravating conflicts of interest or saying FU to others in furtherance of their interests, so you may want consider applying the same criticism of them as you do me.