I really liked when they moved the ADR window from 180 to 90 days in advance. It was for such a brief period of time, like maybe less than a year, because so many guests complained it was too short a window. What I liked about it was that it was actually easier to get a reservation, especially if your park plans changed like many do the closer you get to your departure. FP+ wasn't a thing yet, so maybe that's where the complaints came from. Now with FP+ being at 60 days if you're on-site a 90 day ADR booking window might be better received by guests.