I wouldn't mind someone figuring out a way to put the full Second Midnight back into a production. I know the first act is already fairly full...but I think the show is well-loved enough at this point that people would accept adding another few minutes back in.
Oh, I love "Second Midnight." One of the many oddities of Sondheim's two books is the version of "Second Midnight" that's in there, which is missing stuff.