First post here. Been lurking for awhile and wasn't going to sign up, but I couldn't pass up telling my two theories.
The first one, Teebins train thing. I think it has to do with the effect in the one window he was talking about before. It was all ready to go and something stupid happened to break it, which is why it is not working. The metal crossing the trains tracks would do minor damage, hence it is out of commision now, but will be back later.
My second is with softs. I think that some day this week they will open Hogsmeade. This will not happen on a day thaat DD is open, but Hogsmeade is closed. Too difficult to open Hogsmeade with the temp DD queue. So I think they will open Hogsmeade in the morning or a couple hours into the park being open. I don't think FJ will open at the same time. After they see the crowds and everything then at some point when they think they can handle the current crowds they will open FJ, if FJ has run through all the proper tests. I think FJ is working and is fine, it just has not completed all final testing before handling a large volume of riders. There is no way they had TM previews last week and hogsmeade won't open until package holders. They need to have it open an entire day to deterine crowd flow before they piss off people who paid extra to get into the park early.
JMO, I know nothing, but after being there yesterday and seeing how everything is set up, this would be my guess.