I'll miss it as well. My 4 yo DS loved it a few weeks ago, we saw it 3 times! We have the millenium CD and every time we hear it he says "Mom, that's the parade music!" It was a nice change of pace from the rest of the Disney parades, I hope they come out with something just as good. This was our 3rd year seeing it, so it's more than time for Disney to change it. Honestly, I'm surprised they waited this long to do it.
In February when we were there I did hear a few people complain about the parade, though. I guess for someone who's never seen it or heard about it they would be surprised to see it's not like MGM or MK parades.