It would have had familiar elements Star Wars fans know and love, but not be too familiar, like The Force Awakens was. It would take things in a different direction, but not too far like The Last Jedi did. It would have found the perfect middle ground that would have pleased everyone!
It would have adhered to George Lucas's original vision, but not midi-chloridians or Gunguns, nobody liked those. It would have cute aliens that look ready made for the toy shelf, like Baby Yoda. But not Ewoks, those were just a cash grab.
It wouldn't have introduced new force abilities like projecting oneself across the galaxy. It wasn't seen before so it can't possibly be a Jedi power. Also, there would be new Jedi powers because how boring would it be if we've already seen it all?
Rey would be a good Jedi, but not so much that she's a Mary Sue. It's only okay for male action heroes like John Wick or Ethan Hunt to be perfect. Likewise for Luke. He wouldn't have gone into exile because he's an infallible hero (just don't call him a Mary Sue).
The movie wouldn't have relied on fan service. Also, the original cast would have had scenes together, even if it didn't fit the story. It would be just the right amount of fan service.
Luke drinking milk from a space cow ruined Star Wars, so that would be replaced with scenes of him collecting rain water in a bucket.