It's been my experience that WDW is fairly quick while Disneyland is glacial.
When I travel with my autistic brother, we are generally rolling 7 deep (My parents, brother, my wife, and my two kids). For our family, there is no doubt that my brother is who the current DAS system is designed for. The issue for us is the reduction in the number of guests assigned to the DAS at any one time. My parents wouldn't be able to navigate the parks without my wife or myself, and my wife and I wouldn't navigate the parks with my brother as well as our two children. When combined with the changes to LL, the new dynamic doesn't work for our family.
We were planning on a January trip that included my brother, and I've now been saying to family that I don't think it makes sense for he and my parents to go because of the 4 person cap + LL changes. I can speculate that Disney will come up with an accommodation that works for us, but they won't even have the conversation now without tickets in hand.
We stay offsite, and pre LL changes, the plan was for us to get APs in January. That's very likely out the door as well.