I went to the TM preview last night, and I do kinda have to agree that it is a little "underwhelming" without the ride. I really felt as though a lot was missing last night. Due to the weather the dragon wasn't breathing fire and the entertainment on the stage didn't take place. While visually impressive, the area did leave little to do with the shows canceled and the main attraction not operating. Don't get me wrong, I'm not disappointed in Diagon Alley itself, but I am super disappointed that the awful weather did dampen the experience a bit.