Comments from Josh D'Amaro on the reservations system from an interview with Robert Niles -
"Robert: But you also have to push for capacity, because you just talked about the the reservation issue. I feel, from observing this, that when people talk about or push back against the reservation issue, it's not necessarily [just about] getting the reservation. It's that the [parks'] capacity is not big enough to accommodate all the people who want reservations.
Josh: It's a guest experience issue. This all starts with guest experience, and having been in this business for as long as we have been, we know what constitutes a great guest experience. We know that there are certain attendance thresholds that can potentially deteriorate the experience. So the reservation system change that we've made is completely premised on wanting to deliver [you] the best experience I possibly can. And to do that, I'm asking my guests to make reservations, which is change. Change isn't easy, particularly for Disney, where everybody watches every single move that we make, and if you change something that's tradition, or the way that it's always been, it's hard.
Judging by those comments reservations aren't going away anytime soon.