Poor AI promises to frustrate or bore
The main problem with the game is that where the developers were too lazy to implement AI they would implement a roll of the dice. It gets very frustrating knowing that things aren't going your way due to a bunch of dice rolls. The fights themselves are near completely down to said rolls.
Royal Marriages, demanding annexation of a vassal, alliances... it's all down to dice rolls. A strategy game like this should not have "Gift, gift, try to annex, gift gift, try to annex" as a strategy (but it does, and it's a very effective one).
It comes down to just being a glorified game of risk. One that can be fun, though.