Are you sure about the shop only taking off 1/2 thousandth from the cap? The caps look like investment castings and it looks like they took enough off the take the crown off the casting. I also don't see how cutting 1/2 thousandth from the cap is going to repair ten thousandths of wear into the housing and cap (5 thousandths on each side). I was looking as the angled section near the end of the cap and it looks visibly shorter than the uncut cap. I'd think you'd need to cut at least 10 thousandths which is about how much that looks like.
Also, why didn't Jeep cut the ends of the caps in the first place? That seems like a problem waiting to happen. If the mating surfaces aren't flat and similarly shaped they will wear into each other over time and you will lose your bearing crush especially with aluminum.