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I might be too much of a "Spend, spend, spend!" guy in that I long for unrealistically large expansions, but it doesn't take much to realize that Disney is doing less work with more money. Wizarding World of Harry Potter is estimated to have cost Universal $200 million or so. By comparison, what appears to be, at best, an equal expansion (in reality, I can't see it matching WWoHP, but we'll give it the benefit of the doubt for now), clocking in at $300 million.
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Disney's problems appear to be that they are over-cautious with investments (I mean, is it really that unclear that even a couple C-Tickets at Animal Kingdom would make a world of a difference?) and reckless spending. Fix the accounting problem, and they will be able to get a lot more bang for their buck.
The issues are a whole lot more complicated to address than I make it sound like, but if the Disney executives are really that great, they should be able to do something.