The TA's approval was much less an approval of ALPA than you imply. There are thousands of reasons individuals pulled the yes lever and opted out of the fight. I'd bet many of them had zero confidence in ALPA to improve the TA, and simply caved. That's not an endorsement.

That's just my two cents. I voted no based on the merits of the TA. My problems are with the leadership and mechanics, not the concept.