There is one thing that would be awesome if you could fix:
When the list of actors is written, it always ends with a comma. So you end up with something like:
<leadPerformer>Person A, Person B, Person C,</leadPerformer>
That ends up displaying the trailing comma in the Media Center UI. To get rid of it, you have to manually edit every XML file after you do any updates using the GUI. Any way that trailing comma could be fixed?