There have been issues with inventory with certain hotels not bookable on points, others withholding most of their inventory from award redemption. Some General Managers at legacy Starwood properties have been upset by Marriott’s award availability policies and pricing — and have pushed back.
However the ability for hotels to play games with inventory is on the way out. And there will be at least a 3 week period before award prices go up next year when availability should be at its best.