What I meant when I mentioned the musical is that the fans of the musical will flock to the house since it's Beetlejuice content. Even on the two days that it was opened, I met a lot of people who were fans of the musical, but thats besides the point.
I could see them improving the ending, because it seemed to be quite abrupt and obviously unfinished. I definitely want to see less mannequins. Its probably going to be the interaction house of the year, so I hope that they make it more interactive. To be honest, I would be interested to see how SIF would work in the house, because you can pretty much see all the way down to the dining room when you are in Dante's Inferno. But I don't think this is a SIF year. Same thing with GATs, I would love for some GATs, but I dont think we will get any.
I'm sure it'll bring fans of the musical to see the house and enjoy the movie as much as they do for the musical but seeing how the announcement came out especially the pics of the house featured on the main website, it doesn't look like nothing's change, granted we don't see the actors in the photos for obvious reasons, the space looks the same as it did when they tested it out last year. The ending I think was just made that way to get one last scare from Beetlejuice with his one-liners before exiting, I'm sure they probably had Lydia as well. Sif and GATs I could see be used but not for this house I don't think, possibly one of the originals.