I think COVID sped up what was going to happen anyways. I've seen it said that DME ridership was declining consistently even pre-COVID and Disney was paying Mears a fixed cost on their contract. COVID and the associated drop in resort guests probably made that arrangement unsustainable.
I don't think that the DME change will make a lot of
DVC members start renting cars. I feel like DVC members already either drive or rent cars at a higher rate than regular hotel guests. I don't see this pushing DVC to start charging for parking.
It's hot every summer, I don't think any more people will be passing out in lines than did in years past. A lot of the standby lines are actually shorter than they were pre-COVID and they move at a good clip since there isn't a FP+ line holding everyone up.