You know, I tend not to include halflings in my campaigns, but this thread has made think about how I would incorporate them into a setting without falling on hobbit tropes that don't make much sense outside Middle-Earth.
Looking at the stats, the main thing they have going for them is Luck. Mechanically this isn't so much drawing a good result but averting a bad one. So, what if halflings had a relationship to
apotropaic magic in the way that gnomes do to illusion?
Every halfling barn has a prominent hex sign painted on it, halfling ladies wearing nazar earrings, and halfling gents sporting shiny coppers in their loafers. Some halflings take this warding magic to the next level and initiate into the School of Abjuration. These Abjurers may appear as simple trinket makers to outsiders, but it is their magics that make the halflings' bucolic lifestyle possible.