Combat AI is still bad. I launched a new game and China and Egypt declared an early joint war against me but they only sent 1-2 warriors and then sued for peace. Then in the classical era I built a small army (2 swordsmen, 2 archers, 2 horseman,1 battering ram) and attacked China, easily taking all its cities, without losing a single unit. This was on Emperor difficulty. But the worst offender is the UI. Even with CQUI, the user interface really brings the game down, it breaks the pace of the game, it hides important information and generally speaking it makes for a very frustrating and unpleasant experience.