I've been reading all of these posts and I don't have much to say about most if it. I don't think there is a good solution that will make even a majority of people happy.
But when the discussion came to "immediate gratification" and the incentive for abuse. I got lost. Here is how I see it:
Rope drop at HS. 1000 people heading for Toy Story Mania. If 1% of them have a
DAS, that is 10 DAS groups. Say 4 in a group for a total of 40 DAS riders. It may take them a little longer to get to the ride, so say the wait time is 20-30 minutes at that point- then they ALL get to get on immediately and have a "wait time" of 20 minutes after the ride is over- (which will probably be used just in the FP lane anyway if they all get in there almost at the same time- even longer if they have to wait for accessible vehicles). Meanwhile the wait time is going to jump up to 60+ minutes very quickly for most everyone else in the standby line- with fastpasses very late into the day or even gone- so no other option than standby for most. The DAS groups could possibly be on their 3rd ride (or maybe even more if it is a DAS abuser and not truly disabled and can run from ride to ride and take advantage of early morning lower wait times) by the time many of those initial 1000 get through TSM. THAT could be an "incentive" for abuse with this system.
** I am NOT debating if it would benefit anyone that needed it or not- just saying how it would look very attractive for those looking to "beat" the system.