I have redeem few night at Renaissance Okinawa Resort on Nov 2015, at that time, the category is 6.
I want to re-redeem again on coming Oct, but the category have been changed to 7, so more reward points. Feel sad
So sorry to hear this, loftus . I understand why you're frustrated! You may have already seen this, but here's a guide to help you determine the 2016 category changes. Let us know if you have any questions.
2016 Marriott Rewards | Changes to Categories & Tiers
thank you to let me know the change, and I found that there have 557 hotels moving up but only 236 hotels moving down. Those number is very interesting.