Many guests feel at home while at Disneyland. This is well documented, as I'm sure you know.
The only times where there's perceived danger inside Disneyland is while on an attraction. Yes, it's artificial danger- but if one is easily frightful, they can easily avoid the attraction. This is especially helpful for young children.
New Orleans Square was brought up as an example- that land is beautiful with excellent dining and street performances. The land itself is an idealized version of reality- a depiction of New Orleans without the negative aspects of the real thing. The ghosts and pirates are contained inside their various attractions. This holds true for each of the lands currently at Disneyland
Galaxy's Edge is breaking this. If you don't fly the Falcon well, a "price" will be put on your head. Now, there are consequences for how you do on an attraction. The perceived danger that one would find on an attraction is now incorporated into the land with bounty hunters, smugglers, etc.
It's a completely different dynamic from what's been established. Obviously, the details are a few right now- and we won't see how Disney approaches the character interactions and stuff until the land's opened- but I'm curious to see how this impacts the experience of the land.
And I have a hard time reconciling a land that's old, run down, and over run with crime (as depicted in the book) fitting inside Disneyland. It only fits at the most superficial level.