Good starting point. I think there's a lot of potential to grow. Perhaps optional rules around communities, deities, cultural development, technological development, etc.
For example, deities often develop around local needs/fears. For example, in my Ironsworn game, the climate is harsh. There's a deity of death and decay that hunts those who have too much and are unable to defend it. There is a saying among the people: "I can already see Darchma's crows flying." The people rarely name their children until their 7th birthday, because only a few live that long.