To really immerse the player, there needs to be a plethora of content as well as "sandbox do you own thing", so you have it all at your fingertips, but you get to decide what to do next - perhaps that quest boss is too hard at your current skill level, so you have to go out and skill up before trying again - also for immersion, LORE LORE LORE! I don't see this as being a problem with the trove of background lore to draw on from the Pathfinder world, but I want to see it in GAME! Books to read (like Elder scrolls), writeable books for fan fiction that can be passed around in-game (like Ultima Online)
Heres Hoping!