That's great.
I was actually thinking about additional rules to make the world and faction creation even greater. That's up to the individual of course, but I thought a cool addition (especially if you're playing solo) would be to roll events for hostile neighbors and tribes as well. So that they don't just grow when you roll it but have their own chance at expansion and even their own enemies which could become your allies. :D
This is of course on a much bigger scale but I thought it could be a ton of fun. I'll probably do an epic solo campaign soon to see what kind of world I can create. ;)