I think you are right as I suspect many of the displaced AA guys would very much desire to get back to their home stations. I spoke with those AA guys in PHX who were happy to get back, along with some who want to go back to SAN, and I know there are other AA guys in different stations with the same views. Doesn't make much sense to solidify their permanent displacement with a "Yes" vote when the opportunity to re-open stations through the JCBA would be the best and (probably) only option.
From what I recall, the TA2 vote came with a caveat of this agreement being "the last, best, and final offer" from the union Leadership. About as good as it was going to get, and hey, there is a great pay raise too (just don't examine scope too closely). Personally, I think it was a real failure of union Leadership to even offer something with such drastic reductions in stations and the expected consequences.
I was actually surprised that UA went back to the union to re-open stations not covered under scope, because the replacements were that awful. The contractors must have been absolutely dreadful.
(Edit: Let me add that I have always had a problem with this idea of "virtual airline" with scores of stations within the domestic network, but in reality only a relatively small number being staffed by actual airline employees. I have always been a firm supporter of keeping stations in-house, but also recognizing a few daily flights wouldn't economically viable for the Company, as well.)