I actually love the way they set up black powder warfare in Golarion. It's not so new that no one has ever seen it before, but neither is it so wide spread that every army in the world has replaced pikemen with rows of muskets (Nobunaga Oda be damned.) Magic prevails as the go to source for destroying large swathes of enemies, tearing down huge fortifactions, and much more. The Gunslinger probably is phasing out the Archer Fighter rather than the Wizard. In a world where Magic and Gunplay may entwine at some point in time, I just say wait and see. Also, I felt Dwarves should have been the ones with Guns. -_- But thats just my bearded opinion.