New changes went into effect over the weekend for Fastpass+ at Walt Disney World enabling guests to make reservations via the My Disney Experience mobile app or through the Fastpass kiosks at the parks once they use their initial three Fastpasses. This was only allowed via just the in park kiosks before this change. This change also includes the rule of when you use your third pass and the fourth becoming available, and so on.
Another change that came to Fastpass+ is allowing guests to only choose one or two attractions instead of the previous required three.
The one thing that a lot of guests wanted changed, the ability to reserve Fastpasses at different parks, has not been changed unfortunately. You still have to use your original three before reserving others at a different park.