If only...the AI blockaded ports nullifying the human player's trade income and also relieved their own blockaded ports, then we might see a more competitive and seriously tricky AI opponent.
For instance, consider the Spanish when the player is Julii. They have completely useless land armies and are easy to conquer, but they have an absolutely awesome navy! The Spanish could cause absolute mayhem to a human player's trade routes, should he/she decide their poorly defended cities are an easy touch.
If only...the AI used their top Generals with extreme caution in battle situations, then we might really be bothered by their one or two 8 star Generals invading our land. As it is, if you win, you invariably kill their General in the first battle.
:charge:
If only...