The standard has already been set. They have to provide accomodations unless it impacts their normal business operations.I think there will be a legal standard set within the next few years.
In all honesty I think the phone call interview alone would fail ADA if taken to court as well as Guest Relations not being able to answer ADA questions on specific attractions.
Also… this is why the ADA exists - so large corporations can’t just make up rules.
They now have 10s of thousands of not hundreds of thousands data points showing exactly how it has impacted their operations. Part of the reason they let this go on so long was to collect that data for future use.
I suspect these new rules are the last straw before they scrap the program, if the fraud gets out of hand again. I think they are mostly trying to do the right thing, but they are not going to let it run their business and the courts say they don't have to.