I don't think there is any point in getting too excited about the PCCC. Even if you do not agree with BASSA, most people would want to join an effective union that will support them through disciplinaries and other problems. If the "union" is too biased in favour of the employer, then who would have any confidence in that association being able to fight your corner?
Clearly it is a quasi union set up under the auspices of BA. If there is no joining fee or subs, who is paying the bills?
For example in Mixed Fleet contracts, if a union agrees inferior T&C's, then BA can implement them. Who is to say that the PCCC is sufficiently independent to protect current MF crew from any further erosion of their contracts?