Sorry to hear that
@wcfinvader ,,,
Didn't find a root cause, as they had a pack (remanufactured after all as I had expected it would have been) that they simply installed rather than the loaner/rebuild of mine as you describe.
The good news is that, although a reman, it's right in line with what my previous pack range was (I got 227 miles for a 90% charge this morning). And it's a "-D" revision pack.
Out of curiosity, what's the age/mileage for your pack at the time of failure? Also, did you have the rapidly reducing range like I saw?