I agree with you here (hey it can happen!

) which is why I decided to quit worrying as much and just go. I still don't like what I see but I agree that that could change.
Agreement? No! The world is all akilter!
Sorry to quote you twice but I see one possible danger when it comes to newcomers. Family members who have been and choose not to go again have to travel during busy times and cite long lines and crowds as one of the reasons they don't care to go again. IF the lines actually get longer (I don't know if they will before you correct me) that could actually cause trouble for them too.
Plus they could unknowingly pull FP+ for Stitch.
I understand the concern on the first part of this -- but, as you said, we don't know yet if the lines will actually get longer when the system is fully up and operational. But I do understand the concern.
As for the second part ... maybe they
will unknowingly pull FP+ for Stitch. But to me, that's the same as someone unknowingly showing up at Cinderella's Royal Table without an ADR and thinking they'll get a walk-up. I'm sure that happens every day, regardless of how long the ADR system has been in place or how many people know that CRT is the hottest ticket in the parks. People will be disappointed. They'll learn. They'll know better next time. And if there isn't a next time, then ... well ... there isn't.
My family took its first trip to WDW before Epcot was open. We had A-E ticket books. We had no idea which attractions were "worth it" from an E-ticket standpoint, and ended up buying additional E-tickets when we found out that we missed most of the best rides because we used our tickets for the first ride we saw instead of reading descriptions first. And so the next day, when we went back, we had a plan and knew what we wanted to see, and had mapped out a strategy. It never occurred to us to be upset with Disney for not walking us through the system or telling us up front that we needed to read the guidemap first. That was all on us.
And a few years later when the ticket books went away and we had to pay a whole lot more for a ticket that included everything, we didn't like it, because there were lots of things we didn't want to ride. We didn't like that we were paying a higher price for the same rides and shows we had seen at the lower price. Disappointed? Sure. Maybe just a little pissed? Probably. But we sat down and re-did our plan and discovered that some of the rides we would have never ridden under the A-E system were worth a second look, and we had a good time, even at the new, higher price.
The family we went with never went to Disney again once they went to a "one price" system because they didn't think it was fair.
