EricTheGreat12
King
The actual tactical AI doesn't seem to be so bad:
It moves and shoots, it doesn't water under enemy fire, it keeps fortified units in cities to increase city deffense & not commit suicide, it switches to unit-production under siege (even in close-by cities to help out). It seems to prefer larger numbers (if available) to attack enemy cities. Even more, some impressive "trick moves" were reported.
Frankly, it doesn't matter how well the AI is able to manage little groups of troops. The AI needs to be able to lead an army and fight sieges, which is the most essential criteria. If the AI cannot accomplish this, then it's as good as dead, and will probably be on the same level of Civ5 Vanilla.