Yea i dont like this new AI too. Like war with Incas as Spain. He come up to Seville (walls + 3 city garrison I archers on hill) with 5 quetchas (some combat II, some city raider, some attck) and 4 native archers (all city raider I), he attacked me with 3 units of this stack, and than retreated. Also AI tend to defend its capitol city with only one mercenary archer, and when his contract ends, his capitol is left undefended... He will not stop temple production (10 turns to go) to make a new defending units... not to mention he has slavary adopted. (he was in my team).