Briefly, we all know that the building / teching aspect of the AI has been improved and it gets more units. However I've seen some examples of the following on King: 1) A settler sits in the same position for a great number of turns, with good terrain to settle within reach, often with an escort and no barbarians or hostile units nearby 2) An enemy unit passes up on the opportunity to insta-heal by pillaging a farm and instead moves next to a city whereupon it gets bombarded and killed 3) Invading an AI's homeland, it sends units out to pillage tiles in city states, instead of consolidating its forces in order to fend off the mortal threat to its existence. I remember this as far back as Civ4. There should be some kind of trigger that tells the AI that it is fighting for its existence (e.g. large scale invasion, threatening its capital) and it should never start sending units off to pillage distant tiles. These examples are so egregious, I sometimes just feel like quitting the game. It's like playing against a kid.