Yep, Jazz Hot is very, very good too. (I assume you've guessed I really enjoy the big production shows.)
Cruise Director aboard "Legend" was Jen Baxter, and she's a hoot. I think she'll probably be there when you sail as well.
I think you're right about the Spirit class ships having four singers, instead of the normal two. I noticed that on "Miracle" also. I'm not sure why I enjoyed "Big Easy" so much. I think it might have been the fast pace of the show, and the fact that I know 99% of the music. Anyway,,,IMO,,,,GREAT show. 8)