Sure. But many have booked FP and never end up going to the park. You have to cancel your park pass reservation. It's a better tracking system. And I do believe they want to limit capacity in the future, even with park-hopping. They want control and they want to know exactly who's coming into the parks, which means they can staff accordingly.
I don't see park reservations going away, personally. (And both Bobs have acknowledged the crowding problem)
Day of fast-passes needs to be the way they go. I'd also suggest they start doing more virtual queues, despite the issues with getting one for RISE.
And to others, let's not pretend day guests and hotel guests dont, technically, get 'priority' so it's really not going to lessen the ticket for them. They are almost guaranteed a reservation.
But could you imagine having to book a park pass, book dining and book FP? I wouldn't blame anyone for not wanting to go anymore.
It's so much better without any of that, but now that crowds are slowly increasing ....