Judging by some of the properties in the OP's list, I wonder if it's more appropriate to call some of the changes a "reevaluation" by Marriott to reflect the quality of the hotel property experience.

Speaking for two of the properties we personally stay at a few times a year, I'm surprised to learn that the Philadelphia downtown Marriott was not already a category 5 hotel. Likewise the PHL Airport being a 4 is IMO the minimum category rating I would give the property given the overall property & the excellent restaurant they have at the airport.

Last year, Marriott raises the London Renaissance Chancery Court from a category 6 to 7. A move long overdue given the property's location, architectural aesthetics, and above all quality of service and guest experience.

I don't see moves such as these as a devaluation of our MR points. It speaks more to the diligence of Marriott and the quality of experience that the property holds for any guest.

Barry