The solution to limited immobility is only secondly an ECV.
The first solution is the removal of obstacles. Such as height differences, pointless steps, and needlessly long distances to walk.
Well, by that rationale (and considering the complaints about walking), EP should be pretty much wiped off the map....
They're theme parks. They have immersive elements which sometimes entail mild hills, a few extra steps, and even a bit of a walk from the parking lot to the front gates. It's not poor design, it's part and parcel of the experience. Just as having to walk the distance from the parking lot gates to the World Showcase is part of the same for EP.