This was a post I copied from another poster on a different board but it gives a good perspective on the issues with G+ and FP+
I just don't see how pushing this to advanced reservations is going to solve the true problems with Genie+. Take out the price point from the discussion and the primary issues are a level playing field and the unnecessary complexity for the guest.
Fastpass+ was not a level playing field. Resort guests had a distinct advantage and that didn't have a price point attached it. It also had a layer of complexity with the different tier groups that further benefited guests that knew the complex system. On many occasions we would book FP+ reservations for attractions like Muppets and Voyage of the Little Mermaid to clear through the 3 FP+ advanced reservations and free up our pass for everything else. That's a very flawed system. The switch to Genie+ eliminated a lot of that BS, but also kept FP+ in many places where it wasn't needed to enhance the "value".
If Genie+ introduces some sort of advanced booking option, that advanced booking will have to have a window of time where guests can make their Genie+ selections. Is it midnight the night before? Is it 30 days before? Is it 30 days+ the length of the trip if you're staying on property or 30 day + the length of date based ticket? All of those will result in the exact same problem they currently face during the 7 AM rush.
Paper Fastpass did not have this problem in anything remotely close to the same way. You absolutely had lines for the Fastpass kiosks at park opening at Toy Story Mania (DHS) and Radiator Springs Racers but those lines and your placement in those lines were predicated on you being in the park early. It was no different than someone rope dropping their favorite attraction. This was just future planning the day.
If Disney is insistent on using an alternate queue, be it
Lightning Lane or Fastpass, the best approach has been proven to be that the alternate queue should only be available for reservation day of, when you're in the park.
If Disney is insistent on using advanced bookings it absolutely has to be limited to one per day and however far in advance you can make that advanced booking has to be the same for resort guests, non-resort guests and AP holders OR they have to remove the price point on Genie+.
My assumption is that they haven't figured this out yet. I have yet to see a level of competence amongst the park operations decision makers in quite some time. We have had over a decade of decisions that are anti-guest.