I want to start with the disclaimer that I haven't read the entire thread but I've read, heard and debated this topic a LOT over the few days.
I visit WDW regularly and I have two adopted children with disabilities. My elder daughter has both physical and developmental problems including severe autism and what is medically known as "moderate mental retardation" (that is her DX and I'm not advocating the language used). My younger daughter has attachment disorder and PTSD from abuse she suffered. Both of them struggle during our visits to WDW in different ways but our belief has always been that we will manage their struggles and support them through it rather than get a GAC. The reason we feel that way is that the outside world will not change and allow my children to skip the line and we do not want them to expect that to be the case. This is our belief but I respect parents right to manage their situations in the way they see fit.
The situation as I see it is that people without genuine disabilities have abused the GAC system for a very long time (and I mean genuine, not invisible disabilities because no one would know that my kids have the level of problems they do by looking at them). Another contributory factor to this is that genuinely disabled people have set the cause back years by hiring themselves out as "guides" to other people who just want to abuse the GAC system. This has made the system unsustainable.
In addition, the GAC was NEVER a promise of "skipping the lines" it was very clear that it offered an alternate wait area etc. The fact that this usually turned into skipping of lines, that was not the intention and never a guarantee.
When I hear people complaining about the new system it makes me very angry. I have heard things like "my child can't wait more than 10 seconds" and "this is discrimination". My view is this, if your child can not wait for 10 seconds, then taking them to WDW is cruel because they may have to wait longer than that to use the bathroom. Discrimination is the act of treating someone unfavorably, which is not the case here.
The new system is fair. In fact, I would say it is more than fair. It makes allowances for those who can't wait in a line but also means that people who have paid the same amount of money to be there are not sidelined after waiting for 90 minutes to get on Toy Story Mania. It is a happy medium. It seems to me that too many people do not want a happy medium, they don't want allowances and accommodations to be made and nothing short of skipping the line is good enough and that is wrong.
My kids throw themselves on the floor if they can't get what they want when they want but my job as a parent is to pick them up, calm them down or remove them from the distressing situation. It is no different to having a toddler in a tantrum. You deal with it like parents do. There is no need to skip a line, a card to come back at a set time combined with FP or FP+ is sufficient allowances.
Our special children need support and help through difficult situations, not shielding from them. They need to learn how to function in a world that they find difficult. They need help to cope. If we are ever to get equality for people with disabilities, then it has to be equal across the board. We can't claim to seek equal treatment then expect preferential treatment. My children are disabled, they struggle with life and they struggle at WDW, but I refuse to make them dependent on preferential treatment because honestly, they won't get it in the outside world. They're not going to get to skip the line for the bathroom, or the grocery store check out.
My children are disabled but they can wait their turn, they just can't wait in a crowded line so we use FP/FP+. I don't like that people are bashing Disney for being fair and reasonable.