I suppose Return On Investment is also a big part of my concern. Pixar invested millions to make the movie. DLP invested millions to build the first Rat attraction. Presumably millions are already being spent to get the thing built in Orlando.
A good company manages its cashflow intelligently by getting as much ROI as quickly as possible. Yes, the movie was paid for many times over, but there is still more to be made. Plus, tons of money is currently being spent. Waiting for three years to get an additional return on both those investments (the movie itself and the money going into the future ride at Epcot) is not a smart decision. If I pay one of my employees $20 per hour to work on a project, I would like to have a return an that $20 per hour as soon as possible, not three years from now. No, the project shouldn't be rushed and have problems down the road, but something tells me that they really don't "need" three years to prevent those problems. (Plus, some problems may occur no matter how much planning goes into it.)