When one is making a movie is movie not shot out of order? Are adjustments not made? Are reshoots necesarry? Can a movie sometime take years to make? Yes Yes Yes.
GL sees the saga as one long movie. He shot it out of order. He rewrites, he re-edits, he changes, adjusts continuity, musical cues, adds, subtracts. The fact that he does it over the course of 30 years does not change the fact that he's making a movie. Hes an experimental filmmaker who is working on a lifes work. The only strange luxury he has is the ability to constantly re-exhibit portions of this "One big movie" to show us his latest draft. Lucas has always maintained that the release of a film is nothing more than a business decision. It is not an artistic one. He has joked that maybe the next films he makes will not be released, they'll just be for his own private amusement. Of course he'll release them, but philosophically he sees the difference. The line you stand in and the ticket you buy to see his latest release is 100 percent independent of his agenda as an artist. He understands and appreciates that he is virtually the only filmmaker in the industry who has the luxury of owning his own film, keep working on it regardless of its "release" and to have a built in audience that will financially support him.
If you look at the Star Wars Saga as a giant film production as he does, then he is doing nothing that a regular filmmaker with a smaller film wouldnt do. Forget the "release" of the movie. And the fact that the 1997 versions of the OT will in the end be the MOST FORGOTTEN and HARD TO FIND DEAD AND BURIED drafts of the movies when all is said and done, especially proves that there is nothing definitive about them. The OOT (77,80,83) seemto have finallyresurfacedfor posterity and will be somehow preserved over the 97's. 97 is dead and buried.
Really the crux of your argument is that you're trying to diagnose Lucas as a nutcase. Are you a doctor? That's pretty lazy arguing there. He's just a guy making a film, and he works slow, and wants to get it right. Understand?