I would share an idea for the Pathfinder Chronicles product line.
First of all, I love the Pathfinder setting and its slogan: "Golarion Needs Heroes!". It really send the message that "this setting is yours", and "heroes will make a difference", and "if heroes don't do squat Golarion will end in a ball of fire". :)
Second, I've not read all the Pathfinder products yet, so maybe this idea is already in motion.
It's a simple idea that would help to enforce the feeling of belonging to Golarion, and help game master develop in it.
The idea is simple: add some blank space for us to fill.
Big, deliberate, empty spot waiting for us, like important NPC's, the major villains of a story, an important artefact, or even an entire city!
It has been done before and successfully. Some blank are more powerful than any 12 pages description of what the Prince like to have for dinner. Blank space helps a lot to make the campaign yours, whether you're a game master developing a campaign, or a player trying to fit in.
For example, in Green Ronin's Freedom City, the richest person in the city is (BLANK). The last person to join the Freedom League is (BLANK).
There is a character named Star Knight that a player is supposed to play, otherwise it doesn't even exist. An so on...
Even the best design take into account empty space around it. The FedEX logo for example. Even the universe is 99% empty space, or 22% dark matter + 74% dark energy.
So please Paizo, add more blank space to be filled by our burning imagination.