Well for one, politics. Can't run on removing part time poverty and then turn your back on it the first year. Personally I'm glad he's do this. We have enough division between the FTers and PTers. Selling them out again would only widen it more. With social media the younger pters are getting more accessible and to ignore that would probably be political suicide at some point.
I haven't heard anything about attendance but I do know in my area the company was trying to add "other serious offenses" to our cardinal infractions.
Depending on your supp language the company can already move the vast majority to T-S. 22.4s are gone so now the RPCD language I would assume is as well. I don't know of any language that says routes must be bid M-friend. I do know some areas have a date that FT drivers can not be forced to a Sat schedule but I think that's still pretty low. Like 2008 or something.