It is not Disney's fault people expect something they are not told they are getting. I could expect Mickey Mouse to meet me and hold my hand as I enter the park in the morning, but that doesn't mean it is going to happen. Or that it is logical for me to think it should happen.
What good does it do anyone to expect ADRs to be something they are not? All it does is make that person frustrated and upset. As one of my bosses is fond of saying, it is what it is, and that is what you need to work with. Expecting an ADR to guarantee a time when it doesn't, and then being upset that the time is not guaranteed, is illogical at best.
Deal with what is, and stop banging your head against the wall.
No head banging here. I'm merely stating that in any restaurants in the rest of the free world this would be an expected business practice if they wanted to stay in business.
I'm actually half expecting that Disney knows this and will adapt their policy in the near future. If they don't they are showing alot of arrogance demanding this type of commitment and not proving the service that would be expected everywhere else. Time will tell how which strategy they employ and how it works out for them.