It depends on how you run your Kralorelan game... Obviously if you're in a central province it will all be Kralori-centred, but the closer you get to the margin*, the more important these barbarian intrusions will become. It feels very authentic to me. My main beef is not about Kralorela per se, but about her depiction as fantasy Míng/Qīng China, which completely clashes with the Bronze Age feel of the rest of the Lozenge.
*a very Chinese concept BTW in terms of adventuring