Disney hasn't said anything officially, but you have to assume that by taking the advanced purchase revenue off the table that they are planning on making it back with surge pricing similar to Individual Lightning Lanes.
Yeah I can definitely see that being the case. Seems like everything is going to either a subscription or an on-demand pricing model these days. I hate it, but at this point I think there's no going back. It's the best way to extract as much money as possible for a fixed set of good/services.