Typically, major developers and commercial interests are wired closely to city hall. They not only know what to expect but where to expect it. A little advance knowledge can be worth millions, yet often only costs a few thousand in campaign contributions. The result is called spot zoning. A PUD is essentially a rezoning of a specific site granted to a developer or group of developers.
Plan emphasizes major new building and destruction of old landscape.
Plan assumes significant physical changes. Plan emphasizes renovation and restoration of existing buildings and landscape. Plan assumes preservation of physical and social character that brought people to the community in the first place. Planner's vision takes precedence over the community's values and desires. Plan reinforces community values, desires and social organization.