I know I am in the minority here, but I hope they don't come back.
What you are experiencing in the parks now is how it was before fast pass. Everyone waited in the same lines, but the time went quickly because there was no extra fast pass line, and we visited with others to pass the time. If I didn't want to wait in the line, I would just skip it and go back later.Everyone was equal that way.
You can just wander where you want to, not where you have to be, and do what you want. No pressure to get to a certain area for a certain pass. No stress and more freeing, IMO. So, I hope it never returns.