Zones become overcrowded and crash because they make lucrative open world battles like S ranks and Ixion so rare. If you had coded your game to be able to handle it, fine, but you didn't. Stop making content in such a way your own game can't handle. Either make the things spawn more often so the need to camp them or rush to kill them diminishes, or make it so people don't need to kill the bosses so many times. If the Ixion mount cost only 2 horns the "congestion" in Lochs would immediately be resolved like it has with Foxy Lady.
