I'll address this one first since it's not merger related. Those diehard DOH guys wanted more than the attrition - that could have been protected by fences as well as the widebodies. They were the one's that insisted on nothing but DOH.and threatened to recall the MC if they didn't comply, and that was after the MC said that they would be able to protect both attrition and the widebodies. As SH is fond of saying, don't pizz on my leg and thy to convince me it's raining.
USAPA has yet to propose any C&R's that really protect the west pilots - DOH will be nothing but another name for moving backward for them as they move to what those diehard DOH guys maintain is the west's "rightful place in the line".
While you're right that APA's 1st (and only for now) function is to protect the AA pilots, the last thing AA wants is for the merger to be tied up in court for years or fall through because of that possibility. So APA has an interest in avoiding the legal system. At least one APA rep has said to AA pilots "If you're at 50% of your fleet before the merger you'll be at 50% after the merger." That sounds like some form of relative position to me, especially since it wasn't said that "fences will make sure of that."
You can wish for a 3-way based on current positions all you want, but as another saying goes "Wish in one hand and crap in the other and see which fills up first." You're won't be the majority fighting a minority this time - you'll be the minority fighting a majority twice your size with APA representing you. You just better hope that APA represents you better than USAPA has represented the west...
Jim