My guess is that they aren't going to commit to a start date until they know how the new DVC at GF is selling. I don't have anything to support this other than old patterns, but it seems likely. The refurb will be done in early October so I am sure they are going to wait on any additional construction until they are ready to start the DVC project.
That would make sense. For us I just want to know what will be happening around Aug 2014. Only time will tell.