The more I think of and research YOUR Imagination the more it upsets me.
This attraction was underbudget, possibly rushed to fit the Millenium Celebration, cut plenty of effects (so far all I know of are the endless stairway and an interactive art gallery), cut Figment, cut an entire backstory out, had a (somewhat) interesting original story planned that would have been more interesting and fitting compared to the Imagination Institute (journey into a child's imagination).
And the worst part is even if it had the budget and time to do everything planned out it still would have not been a decent successor and still would have insulted guests by saying they had no imagination.