From the FAQs:
Will I be guaranteed that my room will have the bed type, view or location I requested?
When making a reservation online, you can select a bed type specific room. Choices vary depending on availability.
Hyatt is committed to accommodating room type preferences and requests. Occasionally, we receive more requests than are available at a particular hotel or resort. If this happens, every effort will be made to meet your room preferences.
I actually thought there was a room type guarantee for Globalists but I guess not
-- that's one rare advantage that Marri-wood has over Hyatt!