Yeah I was thinking of making some book units, maybe based on the illustrations in the books and stuff. But judging by the trailer they don't need new models really, the vanilla reskins are gone.
For unit recruitment could we add "info building" to provinces? That have some text from the wiki or whatever but that also make the units trainable from that region? There's a limit on hidden_resources I think... Or they could be rectuitable anywhere just with a limit on number to reflect how powerful that house is? The whole sending units halfway across the map to replenish is kindof annoying, say what you want about warscape combat but it handled replenishment and attrition much better.