Like I said, the UAW wants management that they can control. They don't care if it's good or bad, so long as they can control it. And that generally means it'll be bad.
I also point out to you that the UAW is big on forcing unnecessary workers onto management. And then management figures, "Well, we don't need this many workers, and we can't sell enough Trailblazers to keep them busy, so let's create a new kind of Trailblazer, and maybe we can sell a few more of them."