My niece and I had a good experience seeing the films for her first time in what I like to call the Obi-Wan order (or flashback order): 4,5,1,2,3,6 (7 hadn’t come out yet).
It let her see ANH first as is proper, then go on to experience the ongoing drama and surprises of ESB. Only at the reveal, which genuinely took her by surprise, did we jump back to the prequel trilogy. (I wouldn’t consider the machete order a viewing order since it skips a movie; if you’re gonna skip one, why not skip all three prequels?) After we see Anakin become the villain we learned he was, we jump back to Luke’s journey to rescue Han and go on to confront his father in the climactic conclusion.
And I also agree that at this point a person’s ideal order for induction should be 4,5,6,1,2,3,4,5,6,7. Watch the original trilogy, then wait a while. Then see the prequels, then originals, then go onwards from there. If you like, use OUT for the first one and (fanhandled versions of) the SEs for the post-prequel viewing.
Can that be a new term we use? Fanhandling?