The way I read cleanup, is to make the existing animation look as good as possible without needing to make any drastic changes.....such as re-animating it.

So, that would include fixing penetrations, adding facial animation (eyes/blinks/brows), fixing lipsync (this has been the biggest single change I've made) and just generally looking for ways to implement the 12 principles (for example, I've added some lag to hands to make them seem less stiff).
In that shot (2_14_02) Yoop is using magic to levitate the book while she reads it at eye level. If you can get her belly not to penetrate the table, fair play to you. But if it's not seen by the camera, don't worry about it.
If you shift the heros you'll have to make sure it doesn't create continuity problems later on in the sequence. Downloading the rough render animation of the sequence (on the wiki) will help here.