The funny thing is that the scheduling committee makes changes behind the scenes during the bid runs to make the runs work out with as few problems as possible. This is the EXACT same thing as globalization, it's just manual globalization instead of automated.

Here's a little secret. PBS doesn't honor seniority. It honors seniority AND credit. If you are the most junior person in the company and you have vacation you can get a line because you have pre-assigned credit.

Personally, I love PBS. The globalization thing is just a red herring. There are bigger things to worry about with the new contract. Focus on those.