The producers of Copperfield! have added the subtitle The New Musical, presumably to alert anyone who saw the notorious 1981 flop Copperfield, which ran only 39 performances, that this show is not a revival of that one, which New York Times critic Frank Rich described as “the kind of musical that sends you out of the theater humming every score other than the one you’ve just heard.” On the contrary, the new Copperfield! is an energetic and melodious delight. If Dickens at Christmastime is a tradition, and A Christmas Carol is starting to feel shopworn, Copperfield! is an ideal substitute.