Can you make it so that generals get different bodygaurd units depending on where they are born. I do not think praetoria were everywhere in sarmatia.
Also can youu make it so if a child has a i. e. barbarian father/mother he/she may be a part barbarian in terms of appearance, name and some stats. Also Last of all can you make general's wives different depending on where he is. This can tie into the previous suggestion.