Originally Posted by WT Sharpe
...but that he is transformed from a dispicable yet wholly recognizable character into a giddy, silly, prancing idiot.
I'm not sure you're being entirely fair to the old Scrooge. He seems overly enthusiastic because he has come out the other side of a rather grand epiphany. Although I do think he will go on to be a more joyous soul, I'm not sure I'd agree that he'd remain "a giddy, silly, prancing idiot" for the rest of his life.