I've only been able to look at photos and walk through videos (which I admit is never the same as being there) but agree completely based on what I've seen. I'd also add two other things that make the park look "off" to me:
- Scale: too many buildings just seem too "big" for lack of a better word. Starting right at the entrance with the train-station-that's-not-really-a-station to the castle to all of Tomorrowland. The structures are quite detailed when looked at individually, but detail =/= theme, and they don't ever feel connected to their surroundings. And their large size means they feel inhuman when you're standing next to them, dwarfed by their mass. All the open space in the park doesn't help either; that's why the Imagination Gardens in front of the castle feel like a big area of nothing - it's because they are. They're beautiful, but they're too big with not enough stuff to focus on, which leads to the second issue...
- "Weenies" (or lack thereof): the things to which your eyes are drawn. When you walk through SDL, too much of your view is trees and lampposts followed by more trees and lampposts. There's nothing in the distance that grabs your attention, no structure to focus on. Too often you're walking alongside something, rarely toward anything (just like you would at a strip mall). For example, as you enter Tomorrowland from the "hub" at SDL, all you really see are trees and lampposts. Contrast that to the MK, where the entrance arch, Astro Obiter and Peoplemover all draw your eyes down the walkway and give you successive focal points. It's another reason why the Imagination Gardens don't really work at SDL. Stand at their center and your view is basically of, you guessed it, trees and lampposts. Stand at the center of the MK Hub and you see the walkways leading toward Adventureland, Liberty Square, and Tomorrowland, each providing a small glimpse into each land.
For me, SDL is an example of Disney forgetting how to properly "stage" a theme park. It's not enough to have a few big, impressive buildings plopped around the park. There needs to be a build up, a connective "set design" if you will, to pull everything together and evoke a transportive feeling. The Disney castle parks have always been good at doing that, but with Shanghai it's like Disney didn't care, didn't bother, or just plain failed in the execution.