I was wondering what kind of recriutment model you were using.
I had come up with the (not sure if its original) idea of the Call-To-Arms system. Whereby all units on the roster would be completed in one turn.
Also, units would be cheap to muster, but expensive to keep in the field.
Also, barracks would no longer exist, rather a collection of biuldings would be needed, such as a "wepantake", the biulding Barracks would be replaced by a town square or muster field. These muster fields would expand to eventually reach the highest development and thus allowing for better troops.
It's just an idea.