I don't really mind a huge amount of micro management in a game, I loved that Civilization I was able to expand to my desire, where as I thought call to power destroyed the freedom of the game because you were only aloud a certain amount of city's before you started getting civil unrest, which isn't very realistic, Imagine telling a country of today they could only have 10 city's or the people would revolt against them.
Although having a Sovereign only be able to govern a certain amount of area's themselves makes sense but even so they should be able to appoint governors, because having a huge map is kind of pointless if you cannot continue to expand to the point your control reaches across the world. or being able to control your government's state to increase your control effectiveness. but even mid-evil governments had huge area's of influence in the world at time's, and in reality, money and resource's pile up like mad when your sphere of control grows, as long as your government is decent.