This is something I would like to see. PFRPG rules are great but I find the setting a boring collection of cliches mashed into a generic goulash. People always say use what you want but when your butchering the entire setting and pretending 2/3 or more of it doesnt exist it losses something. Even if its just a nagging voice in the back of your head. I liked the Greyhawk concept that was a basic setting with so little actual detail in the core books that it could be tosssd in anywhere with no effort. Then there were campaign sets that fleshed out several optional worlds. Like I said the rules are great but Im not drinking the Golarion koolaid.