This instant loss of reward availability from all other US hubs than JFK has also been a huge hit for me. Already had 5 nights hotel locked in (can easily get points refunded, but that's not the point) and was really hoping to take Qsuites. Had been looking and saw so much availability a week ago. One odd thing, I did see that there is availability now on Dec 8th DFW to DOH that wasn't there yesterday. So it's very random what has been removed. Hoping it returns soon!