In general, I think the biggest failing with the master planning if WDW is not having more resorts and “stuff” walking distance. This would help to alleviate some of the transportation needs and congestion.
In particular, for example, why isn’t AKL next to the entrance of DAK and walkable? I’m sure there’s argument about the animal areas at both, but that could have certainly been overcome. And it would have enhanced the dining options at DAK which were quite limited for years.
Same things could be said for maybe putting (say) the water parks next to resorts.
And the Epcot monorail line has buildable space along it. Why not a “fill in” station with a resort along the way?