I see no concessions. This was a decent negotiated contract, one of the best I've seen. As for part-timers... I used to be one for a very long time ($8.00-$9.00/hr).
The MAJORITY of young Millennials that I've seen working part time in many different hubs (I've driven to many) are increasingly slow and distracted. By distracted I mean...talking on their phones or working at a unreasonably slow pace that matches the crappy hip-hop music burping out of their earbuds. Many of the part-time supes are no better and they would rather be "buddies" with their hourlies than be their "boss". Mostly due to PC.
It's been getting worse for the past 20 years. Nearly zero positive work ethic. Pathetic and disgraceful.
Thanks to the IBT UPS Negotiating Team for their hard work !