When Marriott Bonvoy made announcements about the combined program, seasonal award pricing was set to be introduced in early 2019. Now, these off peak and peak dates for awards will be in place effective September 14, 2019.
Marriott Bonvoy is also changing how Points Advance (award reservations for which the member doesn’t have enough points in his/her account) are processed. You can lock in the award space but not the price using Points Advance. The number of Points Advance reservations that each member may have outstanding is reduced.