In a word... perfect! Absolutely spot on. I love the ideas for the Costuming building, they really do need to get rid of it in the future and make it something that is part of the Toon Studio. Not only does your plan do that, but it adds a whole variety of new experiences, and saves the Toon Studio area from becoming 'Pixar Rides Land' by adding behind the scenes MOVIE STUDIO attractions (especially when getting rid of AoDA)!
The re-routing of parade route is also great, I really like the ideas for the AoDA and Animagique buildings, and the stage and fountain

Again, it saves it from becoming Pixar Land. And don't get me started on the Studio gates, Dopey Drive and Mickey Avenue; genius!
Monster's Inc Factory Tour is also a stroke of genius. It's never crossed my mind before, but a combination of both California's and Tokyo's Monster's Inc attractions in Paris would be perfect (so the DCA ride, but following a new story rather than the story of the film, allowing for Tokyo scenes like the Randall trash compacter scene to be added).
There's no tiptoeing around this; the Walt Disney Studios needs these additions and changes. Again, why aren't you working at Glendale Ant? =D>