You got it: a new, raised dance floor and a new, double layer balcony, which goes around three sides instead of new. I guess all the lights flashing are new, but I don't know if that would be obvious. Oh, and there is also a humongous new mirror ball hanging over the dance floor, which I'm pretty sure was mentioned last night. Looked to me to be 20 feet across. I thought it might drop down lower to the floor, but if it does, they didn't do that on Monday.
I think the right one went home last night, though I can't even think of his name right now. Although it looks like he may have turned out to be quite the character, right now, I'm more interested in other competitors.