Sulla I want to commend you for your "review". I really like Civ V, in particular the very interesting trades off between cultural, happiness, and the number of cities. I think the social policies is inspired. The unique leader traits make playing a different civilization seem much more interesting than with Civ IV. 1upt makes combat fun.
I am looking forward to playing some MP, which I did very little in Civ IV. One of the the nice things about Civ V is that the narrow range of resource makes starts more balanced. No more situations where you get rice, sugar, and dye, and sheep, in jungle, while your opponent has has gold, wet corn, cattle in the fat cross and stone 3 tiles away. So while CS gives you the equivalent of biology in Civ V. Wet corn or wheat was twice as good as Biology in Civ IV.
All that being said, for the most part I think you criticism of the game are spot on. Right now I am very much enjoying trying different Civs and my next game I moving up to Emperor or maybe higher. Because while the AI is ok at the initial attack, once it falters the AI flounders around like fish out of water. I once had a game where the AI surrounded my city with warriors and archers for 6 turns and didn't launch a single attack (even archers) against the city.
If they don't improve the combat AI and better tune the game I doubt I'll be playing it in a year, but right now it is fun.