Hey, I just called the 888 number. The rep told me they don't have any more of the 5-Day PHs and quoted me $323 (and change) for the 4-day PHs. Said they had seen the 5-day PHs just a few days ago, though. Just called me back as I was typing this and said they are over capacity in sales until January 1. So if your trip is for after January 1, you should be good. If you procrastinated like me because talking on the phone gives you anxiety and need the tickets in the next few days, may need to look elsewhere.
Running my numbers again in my spreadsheet since it might be better to just buy from one of the ones I can go ahead and load MP on it. The savings on the 5-day negated the inconvenience of exchanging a voucher, but I'm not sure a 4-day will.
I am intending to upgrade to a Sig+ (so happy to be getting my AP back!) so trying to maximize potential bridging amount. Even if the 5-day only showed the old value before the 2019 increase, it still was a greater discount by a decent amount than other options. But 4-day might be a push and not worth it.
EDIT: Yeah. After running the numbers, aRes is the better deal assuming that LMTC tickets might only bridge to the price prior to the 2019 increase as someone said they saw several pages back.