Hoping for some insight...
I currently have a Rewards certificate for 7 nights in a category 9. This came as part of a Flight/Hotel package redeemed. Expiration date of certificate is 3/2/2019. Do not currently have any reservation attached to this certificate.
Current Marriott categories are 1-9. In August 2018 the merged Ritz/Marriott/SPG will have categories of 1-7 with category 8 coming in February of 2019.
Question: How will this certificate be valued on/after August 2018? Will it be good for everything in the new categories 1-7/8? Will it be re-valued to something else under the August 2018 category valuation? If this certificate will yield a Ritz stay, then I'll happily wait to book something for after August 2018. However, if this certificate is going to be re-valued (or maybe de-valued) into the new category scheme, then it would be nice to know so as to make use of it before August 2018.
I spent over 2 hours on hold with different folks on the Platinum desk and was unable to get anything other than "don't worry about it". In fact, the first 2 reps I spoke with were unaware of the August 2018 change to category 1-7 structure.