They are re-doing a lot of the sets, it's a lot more than just repainting. In addition there is asbestos abatement going on, and in a building that size it takes a while. There should be an all-new audio and lighting system, and a new soundtrack too. I've heard rumors that they are considering using the original DL soundtrack from 1955.
As for soft openings, I wouldn't hold out too much hope, since the ride is not new, there's not much test-and-adjust necessary. Your best hope is that they just finish early and open it ahead of schedule. I bet next month there will be more reports about whether they are ahead of schedule.