Doing It for the Art: The homage to The Beatles was more important than the plot, hence a few songs and sequences that technically didn't advance the story at all.
Executive Meddling: Attempted, but failed. The studio decided the original cut of the film was "too artsy," and re-edited it to better suit mass audiences. However, Julie Taymor had enough clout to make sure she had Protection from Editors in her contract. She made them release her cut without any alterations, and even went so far as to get the studio to destroy all copies of their re-edited version.