It all hindges on the model. With any historical simulation corners will be cut and short cuts made. To be truly realistic as a monarch you would spend a lot of your time involved in mindless court rituals. To relax you get to go hunting with hawks or bows. The invention of fire arms will revolutionalise your life as you now get a chance to shoot the animals as well. However this does not a good game make, your average player craves a little bit more.
Corners will be cut the player will be able to get to do more than your average ruler/country ever could. To give an example as Spain you get use Cortez to conquer Mexico, in reality Cortez buggered off without any authority and before you knew it Spain ruled Mexico. These are the kind of neccesary abstractions you need to get a good game.
However if you can find the right balance between game play and historical restrictions then you get an easier job for any AI. A sensible set of historical restirctions on colonisation will lead to no need for the AI to be told where to colonise.
Corners will be cut the player will be able to get to do more than your average ruler/country ever could. To give an example as Spain you get use Cortez to conquer Mexico, in reality Cortez buggered off without any authority and before you knew it Spain ruled Mexico. These are the kind of neccesary abstractions you need to get a good game.
However if you can find the right balance between game play and historical restrictions then you get an easier job for any AI. A sensible set of historical restirctions on colonisation will lead to no need for the AI to be told where to colonise.