I do not believe any dramatic changes have been made, only that they have been writing and blocking the show off site until this month. Now they're ready to start modifying the theater to fit the new show's specs.
All I know is, no 3D this time is great, but it didn't help F&F... I think what will, is that this one should (hopefully) be more live action, and less screen. (Kind of like the inverse of the T2 show, which was mostly screen with some live action.)