I agree. It's about time.
I've been saying for over a decade that this was the only real solution - and I say that as someone who has a member of my family that when we bring them needs a DAS.
I'm absolutely sure that some are going to be very defensive about this, but the fact is - anyone that has a disability - especially what we call an "invisible disability" - already has this documentation, or can easily get it.
For example, if you child has a diagnosis of some form of autism, you already have piles of documents that you have to update and provide yearly to schools in order to get accommodations, ones that go way more in detail than it sounds these programs require. It can be dozens or even hundreds of pages of reports from specialists, etc. detailing what your child needs. This is nothing compared to that.
And harsh as it may sound, if you don't already need to have this type of documentation for anything, that your child is able to make it through school, etc. without any accommodations/special needs at home, and/or are receiving no type of medical treatment whatsoever, then a vacation at Disney should be no different. Same for adults, many of whom are self-diagnosed, etc. - if your disability requires no medical or other support care, then claiming you only need assistance at Disney is just not realistic.