Perhaps you should read the entire review again before calling him an "elitist moron," because he didn't criticize the style of the animation but rather its poor execution in relation to other recent animated films.
"This is the first feature-length animated Star Wars movie, but instead of pushing the state of the art, it's retro. You'd think the great animated films of recent years had never been made. The characters have hair that looks molded from Play-Doh, bodies that seem arthritic, and moving lips on half-frozen faces -- all signs that shortcuts were taken in the animation work."
Actually that's the precise quote that convinced me the most strongly of his biases. Those are just the sort of comments that one might make about a set of stylistic choices that one does not understand. The hair is meant to look stylized rather than realistic, while the body movement may be intentionally staccato and limited as an aesthetic choice, much like Genndy Tartakovsky's 2D animation work tends to be. After all, the characters and movement style of The Clone Wars were designed with weekly TV production in mind, so it's natural that the chosen aesthetic would be more spare and efficient than the more lush style of a feature film. And given that that's the chosen style for the series, it makes sense to do the film in the same style to maintain consistency.
It seems kind of circular though, you're saying the style was chosen to fit the limitations of a TV cartoon and Ebert is saying it looks like a TV cartoon. I think you're both making the same point.