Well, I’m not the one saying that TLJ is deconstructing things. I’m not the one taking the middle of the film as the definitive take on its meaning. Normally you look at how a film ends to determine that. And thanks to Rogueleader’s comment above, I found a an endless string of articles on Star Wars being postmodern (the older films, not the ST). And really, there are as many interpretations of Star Wars as there are philosophies out there. There is no right answer because philosophy is really about what something means to you. What I see in all these claims of postmodernism is evidently very different. I found the term pre-modern to be most applicable. Lucas built it on a collection of old things set in bygone days. He added on the layers of internal myths and legends to create a layered and textured world that he threw us into. The list of his sources seems varied and endless. It is Casabalanca, Hidden Fortress, Yojimbo, Damn Busters, Flash Gordon, and so so many others. To know what all went into it would require a time machine to catch all the films and books that influenced him prior to when the film started shooting. As far as I can see, JJ and RJ have followed that eclectic inspiration as they have worked on these films. RJ even posted three films that he was watching for inspiration - Twelve O’clock High, To Catch A Thief, and Three Outlaw Samurai. Very much the type of films that Lucas would have watched (and he actually did watch Twelve O’clock High). I felt he ended up with a film that is closer to the original trilogy in feel than the others. While JJ tried to go back visually, RJ went back to the roots. And if his take is postmodern, then we really need to think about what it was Lucas did because he really created a new mythos for the modern world by basing it in a galaxy far away. If The Santa Clause and TLJ are postmodern, than the entire saga is a postmodern creation.
Like I said, the difference between Lucas and RJ is, that in Lucas’ work the hero works to become the legend, where the hero ultimately overcomes his or her flaws to reach a state of enlightenment, while in TLJ the legend is presented as having symbolic value, but ultimately unattainable in reality, because in the end the best we can hope for is to own our failures, and be at peace with our flawed human nature.