Well,
A couple of thoughts, first to Kyle:
The reason DSP doesn't seem to have many "attractions" is that the general culture is slightly different over in Europe and so they are putting more "shows" and theatre-like experiences in the park as opposed to building a bunch of rides. The true cost in this park will come from paying all the CMs that will perform in the shows. However, I don't know much about the specs for HKDL other than the shareholder report has a picture of the site which, while being very beautiful, didn't seem all that big. I suppose it is possible that they had only cleared ground for a single section of the park.
SeaSpray:
When I went in Dec. the Land was good as always, with the two movies and the boat ride. Now that fastpass is here, however, I never stand in line for the boat unless the wait is <10 min. because that queue is dead boring.
As for the REAL issue at hand, I think the walk-through thing would work well for this particular pavillion, but Now and Luau have a point that without a ride it will be hard to get people into the pavillion, especially when EPCOT has so few "rides" to begin with. I think it boils down to the fact that rides aren't really what EPCOT is all about, but if they were going to remove something, why didn't they take Body Wars!!!??? I have never gotten sick on a roller coaster or any other ride for that matter, but that ride makes me queasy every time I get on it...