Yeah, it seems odd to having this Star Wars "expansion" mostly be a replacement of existing structures. The park needs increased capacity in terms of both walking space and more options for activities. With Star Wars and the crowds it would bring, you need plenty of food service. Don't just replace H&V/50s Prime Time -- add to the offerings by keeping them and building new Star Wars ones too.
If they truly have all this money going to infrastructure and plan to build a parking deck, it is IMHO silly not to make a significant push into the cast parking area.
Also, isn't it odd that they would be willing to spend a ton of money to literally move backstage buildings and tear them down in Anaheim, but they seem reluctant to build on practically empty land in DHS but need to repurpose existing park stuff?