I think people have been, for lack of a better workd, spoiled by the current system a bit.
As parents of disabled children, we need to take on some responsbility to meet Disney half way on some of these things.
I use GAC for my son, but I also use it to teach him time awareness and patience. When we first began taking him to WDW, he loved it but he was combative when faced with waits and we had some of those embarrasing/frightening moments of judgmental onlookers. But, no one can take that in stride better than a parent of a child with disabilities.
So, after our first trip I speant the next two years exposing my son to videos and music of rides and attractions that rarely have a wait. I play the tomorrowland BGM in his room at night to sleep to so he develops an attachment to TTA. I show him videos of LWTL and Country Bears and get him to develop a love for those rides. On our next trip we were able to use GAC for his obsessions (Pooh, Pirates, IASW) and mix them up with minimal waits on the aforementioned TTA, LWTL, etc...
With each trip we try to expand his horizons to new rides with slightly longer waits. This last trip (his 5th) he stood in a 25 minute line for Pooh (thank goodness for interative qeueues and those disgusting touch screens) and sat 30 minutes to get a front row seat for MSEP. He loves MSEP and we told him if he sat quietly and waited he'd get to see it without being blocked by other people. And I'll be damned if he didn't sit there patiently the whole time and got a huge smile on his face when those floats rolled by right in front of him. It was one of my proudest moments and something my wife and I would have never imagined possible 6 years ago.
I thank Disney for their GAC program. It has helped me teach my son concepts I never thought possible. But I have also always understood that it is there to help him overcome his hardship, not to make it easy for him. I know all cases are different, and my method took/takes a lot of work. But the payoff is well worth it. My son still has his moments and it is by no means easy. But he loves WDW more than anything, the GAC/DAS has made that love possible. The last thing I would want is to see that destroyed by abusers. So, I accept the changes as a necesarry evil to keep the system functioning. No way around it.