I'm still not seeing where you think your PWA has been changed by this deal with PCL. It seems that Paragraphs 11 and 12 gives preferential interview rights (and a ratio) to a group of pilots, but they don't preclude preferential interview rights outside of the requirements in these paragraphs. Furthermore, the language is incredibly weak to start with, since it's all "subject to the Company’s objectives for diversity and experience among newly hired pilots."
I think you're really stretching on this one.