You are right that there is much more, but I was referring to the FILMS and it's a valid viewpoint to take as most of the public are going to be using that as their reference. One can't expect that guests are going to be familiar with all the additional fiction created around Star Wars unless they are a die-hard fan.
Plot has everything to do with the tone of the environment in a fictional space as that sets the mood for the action to take place. It's an aspect of visual storytelling and creates the "world" you keep mentioning. Star Wars is designed to be dark and moody and haphazard because that sets the tone for the conflict.
I was excited about 1998 Tomorrowland. It looked fantastic in the renderings which were painted by a very talented artist. What I assume most at Disney failed to realize is that that artist added highlights to all of the dark browns and copper to bring life to his rendering and all those dark muted colors in reality made the land look depressing. What looks to be a gleaming kinetic sculpture (that used to be the old rocket jets) looked like a rusted hulk in the So Cal sun. When I look at the renderings of the Star Wars land I see tall forms that resemble dead trees, cables strung between patchwork structures and the same muted color scheme as the '98 Tomorrowland. It has the character of a haphazard, temporary camp. It fits Star Wars but that's not exactly an inviting alien world.
Renderings Link >>>>