Excellent questions.
1. What will the future appointment authorize the Governing Body to do that is not yet authorized?
I think they explained that they will be appointed to Christ's Kingdom belongings aftter the Big A, along with the rest of the annointed. Problem is this parable a.k.a. "prophecy" says that the only ones receiving these things from the Lord is the FDS. There's a lot of annointed that don't make it to the FDS, including the 12 original apostles.
Go figure!