This is rather an ignorant comment about "heat exhaustion" not being a valid excuse in Florida. If you're not a medical professional, you should not be debating about what you feel is "valid" (unless we're talking about something very ridiculous). I know many people who have disabilities that create situations where they are extra sensitive to heat for short periods of time. A lot of the park queues' are inadequately covered and poorly air-conditioned during the large summer crowds , creating potentially harmful situations to these folks. People with heart conditions, on special medicines, physical disabilities may have scenarios where they can't and shouldn't be out in the heat for too long. WDW is big enough that one can manage these situations decently when not waiting in line for a ride, but when the crowds are large and the lines move slowly, this can be an issue. You and I might be able to stay in the heat and direct sunlight for 30 minutes+, but there are those who can't - and it's not unreasonable to think DAS should be a tool for them to use when this situation arises.
The reality is that Disney created this issue of widespread DAS abuse when they started charging for Fastpasses via Genie+/Lightning Lane. Disney gave people ways previously to work around their disablities or health conditions through Fastpass+ so that they weren't dependent on a DAS program. Since it was taken away, it only makes sense that they've seen an increase in requests for DAS for both those who need it legitimately and those who don't.
Hurting those who need it because of their greed in charging for Genie+ seems incredibly low. This will undoubtedly lead to threats of lawsuits prior to it's implementation with their new "critiera" and I'm curious to see how Disney responds. We already know they're fearful of the Autism advocacy groups (based on their action against Disney when DAS was first altered), so they go out of their way to avoid ticking them off. They're now just trying to see who they can tick off and get away with.
There's no doubt that they need to refine the system. But right now, it seems as if they may have gone too far.