Tracid said:the AI is NOT HISTORICAL. it will not make historical mistakes, it will do whatever it thinks is best for itself. Major wars against major powers that it thinks it cannot win are not. period.
The AI should not accurately assess the strength of itself and neighbours to such a degree. It should overestimate it's own strength, believe God is on it's side, believe in the natural superiority of it's own people and inferiority of others, be influenced by the relative ability of it's leader, etc.
The AI should make mistakes, including starting wars it cannot win. Not a one-province minor attacking France or Burgundy, but a major taking a gamble on a sudden opportunistic expansion and getting the assesments horribly wrong.