If you are promoted you will likely get stonewalled on Tuition reimbursement unless your major is business AND you have prior agreement from HR that they will approve it (which has a coin toss chance of happening).
The more types of positions you have experience in the more (and more often) you will be asked to do things that are not your responsibility. If management is not your best buddy you can forget about meaningful promotions unless you are there 5+years(and even then it's a toss-up); consequently management plays favorites into promotional opportunities.
One of my biggest pet-peeves is that management will reward lazy employees when they step it up, but will not notice active hard-working employees when they outperform on a daily basis.
Furthermore on this note, managers will regularly give "QRP" (Quality Recognition Program) codes to employees they like, and deny them from ones they do not. Normally QRP is given to the current employee of the month, but in my experience lazy people (when they step up) and manager's pets (just for being buddy buddies) will get them on a weekly to bi-weekly basis.
Management will say and even have it displayed throughout company property that "everyone in Fedex Ground started as a Package Handler" but the reality is that only everyone they don't like had to do that. My last 3 managers all started in either their current positions or one position just beneath, neither of which are entry level.
This company will hire ANYBODY so be careful who you upset. I personally met someone with an attempted murder charge on his record as well as people with multiple jail time periods on their records.
Loyalty is rewarded with lower starting wage in new position as you lack external experience.