I agree. I love classic cartoons, but 3-D is not the villain. Tell me the opening 20 minutes of Up isn't powerful and expressive.
I'd argue that RATATOUILLE has plenty of expressive moments where the animators brought the characters to life. In fact, plenty of the animators on Pixar and Dreamworks computer animated films have managed to imbue life into the characters. I'd like to see more traditional 2D animation, but I am not going to be one to put down the quality of work that computer animators have managed to put out. Their work is not inferior to that of animators from previous generations.