Perhaps some of the Byzantine towns in Anatolia need to become rebel, which can be done (Expanded allows villages and cities to rebel, not sure if they can start that way) representing towns that fell to Turkish lords who made of local seafaring skills to create little pirate or raider emirates and other places where a local Byzantine lord cut himself off from his liege lord, if that word can be used for the Byzantines. The Byzantines experienced something of a revival in Anatolia after Constantinople fell. They had to concentrate on making it pay with the benefit of easy deals with Genoa or Venice, a sort autarky. Anyway, it's okay as it is now. It could be improved, but if given the constraints on the mod team, a person wanting a change should maybe it do it themselves and share it with the team and others as a submod. Adding factions is not possible now, I'm certain.