I agree. I mean, I get the hate--Yub Nub is cheese of the highest order--but it isn't out of place for the direction of the film as a whole (say what you will about the ewoks, but they are there, they happened). More importantly, the original ending has a certain fun/triumphant rhythm to it and I'm talking about more than just the song. The way it is cut and how the characters interact is very rhythmic and complements the music, which is largely lost with Victory Celebration. The new song is good IMO, but it doesn't fit the context of the scene very well and feels tonally removed from the rest of the film (and the OT as a whole, really). The awkward cuts to the other planets do not help and just further break that rhythm, which makes it feel flat in comparison.