If you take away the "Wagnerian" soundtrack, telling you what to think & how to feel at every moment, it's pretty dull
Sure, but you can apply that to almost *every movie*. LOTR without Howard Shore is kinda dull. Jaws without the "dun un" does not clearly carry tension the same. Inception or the Nolan Batman films with the Zimmer score is kinda dull. Fact is SW does in fact have the JW soundtrack, you cannot just decouple them, if a director directs a shot he usually has some music in mind, if it didn't they would probably do the shot different.
Does that mean Star Wars was essentially a SciFi version of a musical western? (I don't mean that in a kind way.)
Yes, Star Wars is basically a mash up of a spaghetti western, a Kurosawa film, 1920's serials with a smear of space opera over top. I mean that in in the best way possible tot eh OG trilogy, it all plays into the certain je ne sais quoi
Also Lucas is famously not a great writer, like you said in the OG trilogy he had a lot of assistance, also from his directing buddies as well as people like Irving Kershner who masterfully directed ESB.
As for character & plot development, I understand that US audiences like their stories at the level of Paw Patrol so no surprises there.
Let's not levy this on the American's solely. Every country loves Star Wars, and Marvel movies and hell I am pretty sure China is primary reason we still get Transformers movies so "lowest common denominator" is a worldwide phenomenon.
Ridley Scott is the one commonly credited with changing how the world saw cities in the future.
Sure, except Blade Runner was 1982, 5 years after Episode 4 and 2 years after ESB. Terry Gilliam's "Brazil" also wan't until 1985 and let's be honest all of them reallt just pull influence from Metropolis.
The city size does speak to my point, everything in SW is small, like a western or a fantasy movie. Mos Eisley is a small town bar pretty much. Cloud City has what, a couple thousand people in it from what we see? Even in the prequels for all this huge scale we see the world still feels kinda empty (this is partly Lucas's whole directing paradigm) But again, none of this matter if the parts all work as a whole.