Regarding the symmetry of Innoventions, I think it is a fascinating thing that people are really bothered by it being "off" but how much of that is just because it is different than what we've grown used to for 3 decades?
More specifically, East and West FW were never symmetric - only the hub itself was. In fact, as many have pointed out, the building on East and West were intentioned designed to be very different. East was more geometric shapes and linear designs with straight rigid structures based on "hard sciences". West was more whimsical with curved lines and less defined shapes. The most structured being the pyramid of Imagination but even that was make of clear panels to be have an ethereal appearance.
Why would Innoventions have to be symmetrical? I think it actually makes sense to continue the East/West dichotomy. The physical appearance of Innoventions as a semi-circle fits in more with East and harmonizes with those structures. You kind of have a look of a post-modern cityscape on that side of the park.
In tearing down Innoventions West, and replacing it with a landscaped water area with (seemingly) labyrinthine paths and lush greenery, it fits in so much better with the pavilions already on the eastern half of the front of Epcot. Obviously, execution matters and I don't know what JoW will end up being like, but as a pre-show to the Seas and in the area of the Land, I think it will make that whole area more distinct and unified. It strikes me as a change that is actually logical. If the attraction also has a edutainment quality in addition to looking pretty and providing a respite from the drab concrete of other parts of (old) FW than all the better.
I know it's unpopular around here, but I'm also one of those who felt that Innoventions (especially West) has been a big waste of space for a long time. And actually more annoying because it was a barrier between the actually good stuff in Epcot and actually made it harder to get around by making it tougher to figure out which side of the park was which.
Don't get me wrong, I'm not actually optimistic about whatever festival center gets built. And I do wish that whatever is done there harmonizes and has some attraction capacity in addition to food (why not exhibit space or a theater on the first floor, restaurant on the second, then the rooftop beer garden or whatever?). I guess we'll see what we end up getting.