Had a workshop class with a storyteller and, of all things, a person with a PhD in mythology. Quite an interesting class. She has a big well known grant for Mythos research, so this isn't small potatoes. She does script advising for the film set. Have you tried searching out actual college text books on the subject? If you want it, I'll find her business card for you. Very approachable.
As you can imagine--she was pretty set on the Hero's Journey approach, which is not what JB considers a necessity. It seems to be a chicken/egg thing. Scripting from the beginning to the HJ can be unexciting for me, but there is a very good reason that those old myths (and Gilgamesh, Iliad, Odyssey, Beowulf etc.) have survived. They work. You can't beat that.
I was in the 'not my book, no way' camp. Then realized, wait it is a twisted Pinocchio story... And I suspect re-reading it with that in mind may open some additions that will deepen and improve the story.