I'm unaware of any mention of this specific idea so forgive me if this discussion already exists under other headings.

I find it difficult to manage an empire when I am modding 40+ nations into it. However its enjoyable game play till you take about half the map. At that point I lose control (Misplace Ships) and so forth. Empires alone have survived by placing leaders in seats of power to lessen the load on the emperor. Anyway, a mod or even later an addition to the game that allows for the placement of generals to put in charge of parcels of land and even given control of their own fleets in order to work alongside the leader for king and country.

Let me know your thoughts.