That is a good point. I think we need to keep in mind that when big name brands announce the big new shiny thing is going to be released they generally have to offer incentives for people to buy the old shiny thing.
People have known for a while that there was a big new shiny thing at Disney going to open in the fall. With the uncertainty of if it would be all of the shiny thing or just part, there was not the level of excitement that we might have thought it would generate. Had Disney waited and announced an opening say in late Spring 2020, I bet you would have seen record high bookings for the 2020 vacation season. I still thing 2020 is going to be a slam dunk for Disney but opening fall 2019 with a partial product burned them I think.