It's kind of ho-hum for a place in Golarion. You're right, it's based on American exceptionalism which is boring while the other inner sea countries can be boring but in exceptional and interesting ways. I like that it exists and that it can be contentious and unstable sometimes. Like Andorran mercenaries being a pain in the ass to work with because they think they're the main character and get squeemish about certain crimes. Andorans make pretty good adversaries and instigators since most people might not even disagree with the image they project. But I probably wouldn't seek out any literature or character options about Andoran.
Oh except for one teensy weensy tiny little thing
FUCK MOTHERING GEORGE WASHINGTON BIRD https://pathfinderwiki.com/wiki/Talmandor

BUCAW