World of Color is such a dazzling piece of technology that it's impressive even if you think the show isn't as good as it ought to be.
As TP2000 said, they essentially went for epic and threw cohesiveness and variation out the window. I actually like World of Color better in its quiet moments, such as the original show's opening. Or previous years' Holiday Prep and Landing tag, which started gently with Nat King Cole...and then the whole show melted into World of Color. It was really, really beautiful.
This show was just bombastic from beginning to end. I don't blame them, they wanted to show off all the new technology they added and they went for it. Some segments were superb. The Around the World Small World sequence, for instance. And the Chinese Dance with the Little Green Men is the best, wittiest thing the entire Pixar company has done in years.
I just wish there were more of the "chestnuts roasting on an open fire" type warm moments that make you want to snuggle a loved one, and not the banal bellowing of "BEAUTIFUL, WONDERFUL, MAGICAL..." which is cringe inducing.
Believe it or not, I think this show has more room to grow. With even more ways to incorporate the Paradise Pier surroundings and maybe some new fountains. Imagine that.