I'm struggling to see the benefit for Disney to drop it.
I'd imagine having the realtime data to run a lean staff is something that Chapek would be interested in vs staffing based on historical trends. Add on to it that the reservation drives a sense of scarcity, along with a soft advantage to staying on property to pass holders...it seems to fit well with the whole control supply, drive demand model.
The technology is already built, investment made. It doesn't require staff, does it? I don't know there'd be any cost savings to getting rid of it.