I see no need to make a story canon approved, because the canon was totally out of kilter.. It's your story, run with it. You have some interesting characters, and it's nice to see the hero with a decent life rather than an abusive one. I will continue reading if you continue writing. One thing I have found.. don't let the story write you, you write the story. There should be some point, or conclusion.
Author's response
I liked the whole chapter "The Prince's Tale." I dislike the fics that dismiss that chapter out of hand, or go through an elaborate explanation of how the Snape/Lily memories were fabrications.