Hmm, the extra mouth movements sometimes make the rest of Yoda's face look static. It's still interesting to see though.

But I'm not sure if I like this new Yoda. There's no denying it looks more "real" now, but I've known Yoda as a puppet my entire life... he looks so different now, it jumps out to me. Yoda isn't a background character like the aliens in the cantina scene, he's a main character... I doubt changes to his look will ever be subtle.

EDIT: don't let that keep you from experimenting with it further though, maybe toning it down a bit might help...