The problem with the first movie was that Snyder is a comic lover who happens to make movies. He's obsessed with what looks cool, but not with substance. George Lucas was a movie lover and a lover of pulp comics like Flash Gordon. You can see his understanding of film making in how influential Kurosawa movies were to Star Wars.
Hamill said that his portrayal of Luke was inspired by Lucas and you can really sense Luke's deep desire for adventure and to go beyond farming on Tatooine. So Star Wars was very much a love letter to all the things Lucas loved. Not to mention the stellar help he had writing the story.
I see none of this in Rebel Moon. It looks nice and has all the elements of a scifi fantasy movie, but it's impossible to ignore how hollow it is. It only cares about looking cool. None of the characters feel real or like they're living in that world. There are no small wonderful details and moments like Solo teasing Leia or C3PO enjoying his little oil bath.
We won't get anything like that again unless it's from someone passionate about adventure and the discovery of new worlds. Lucas looked back to stuff in the past, but he elevated the mix of those elements and created something brand new that had his soul in it. It won't be enough with people trying to copy Star Wars and trying to capture the magic of it, which Rebel Moon and The Creator has shown.