So I actually wrote my dissertation about this and it’s not just that the Department of Defence (there’s an office in the Pentagon dedicated to liaising with Hollywood productions), but they effectively have a strangle-hold on how Hollywood portrays the US military since the DoD give permission for producers to use military hardware, without that permission the cost of filming sharply goes up and films end up extremely over-budget. So the producers can either drop any critical elements at the DoD’s discretion, or continue with a film which will barely be released at all and will never make its budget back.
Any American film which involves the military, know that the DoD probably signed off on it, or were directly involved with. Films like American Sniper and Zero Dark Thirty had a heavy government influence, the latter to falsely justify the methods the CIA used in finding and killing Osama bin Laden, which included torture.
It’s why the military figures are always the heros and there will never be a Hollywood film which is critical of the US military because of this. Just remember, whenever you see the US military in a Hollywood movie, it’s exactly what the Department of Defence want you to see. It’s not being hyperbolic when these types of films are called propaganda.
It might have been a more original and broader exploration of the universe, yeah. OTOH, in addition to commercial/nostalgia considerations, I think having a wannabe Empire as the main antagonist is timely and valuable. We’re living in an age of déjà vu, after all, and SW has always reflected the anxieties of the age. That was JJ’s explicitly stated authorial intent, to tell a story about neo-Nazis who look back at Nazis and see not horror and failure but greatness to emulate.
Yeah, I remember walking out of the theater after TFA thinking, “Well, that was a bit derivative and not perfect, but who needs perfect or original for Star Wars? That was a great, heartfelt adventure bursting with fun and love of the franchise!” I miss that feeling. Even TFA has been tainted for me when I remember how these developments pan out in TLJ.