It's down there at the end, that CG Boarding Page 14. Those Focal Points I just don't get them. Can't they just say make your frame look good and less boring by putting your object of interest off center, or did that rule just stick because it's easy to remember and easy to program and overlay.
As someone who's seen a lot of animated features, Fantastic Mr. Fox was fascinating. It made me realize just how much dogma I'd picked up about what animated features are "supposed" to be, pretty much entirely inherited from the choices Disney made in the 50s, which have been relentlessly copied by pretty much every animated feature ever since. FMF was from a very different place, and I found it incredibly strong because of that.
The rule of thirds is just a certain way of composition and some people like its aesthetics.