Not sure how you get from next door to the moon. But everything Disney did was legal and sanctioned by the state of Florida and was operating well without harming anyone and benefited the taxpayers as Disney was basically footing the bill. What changed? I don’t think that the present government in Florida is capable of analyzing this or cares to do so from an economic perspective
Over the years there have been complaints when Disney asked for reassessments on their property values, but then again that's pretty common by businesses. However, I remember seeing someone on DISBoards complaining mightily about it given the way Florida property taxes work, where the "millage rate" is adjusted every year to meet an anticipated budget. So if any assessment goes down, that will necessarily increase the property taxes of other taxpayers.
But Disney had a unique arrangement with Reedy Creek ID that other special districts didn't have. I know The Villages has been mentioned many times, but property in their special districts is mostly owned by individuals. This special district budget is set and basically only Disney pays for it, so their reassessments don't affect how much they pay overall for the operation of the special district.
The unique aspect of WDW is obviously that they aren't like most county taxpayers that use county (or city) services paid for with property tax revenue paid for by a wide swath of personal and business property taxes. The vast majority of those services are provided by the special district, so the money that Disney pays for county/library/school taxes aren't really going back to Disney in any appreciable manner. Even the police services they receive from the county sheriffs are paid for as a contract service with the special district, so county taxpayers aren't on the hook for that. This is clearly a net benefit for county taxpayers with a willing taxpayer paying money that they're not getting back in the form of services.
I guess the thing that some find troubling is that the taxpayer in the this case basically has no representation on the board. And it's pretty clear that meant to consolidate the power of the board with one person deciding on that. This is the kind of thing that few people would stand for in their own lives, but are OK with if it punishes someone else that they disagree with.