I would disagree with you on that one. I think the updated version of the 1961 World of Color theme song sounds great. And we also have to realize this World of Color jingle isn't going to be playing
constantly throughout the entire 25 minute show. It's the title song that starts and ends the show, and pulls it all together thematically.
Did you know that Disney had the
London Symphony Orchestra record this shows entire soundtrack a few months ago in the famous Abbey Road Studios in London? It was all custom orchestrated to match the various themes and images for each scene in the show; Pirates, Alice, Pocohontas, Nemo, Fantasia, Lion King, etc., etc.
They could have just cut and pasted snippets of music from all this stuff, including the old 1961 version of the World of Color song. But instead they went to great expense and energy to get one of the best symphony orchestras in the world to craft this custom soundtrack.
It's going to be epic, and something only Disney can do when they are at the very top of their game.
Maybe this Disney Parks Blog post from Steve Davison would help explain?
http://disneyparks.disney.go.com/blog/2010/01/world-of-color-abbey-road/