Just a quick note Rhye: It seems there is some definite gameplay unbalance in any likeness. What I am talking about is how older civs can completely dominate the newer civs if they survive barb invasions and instability. I'm not sure how much you can do, but it seems that just the way normal Civ IV works is what makes the older civs have a much advanced economy. The classic example (at least for me) is Rome and Greece being almost an age ahead of the newer European civs shortly after they arrive.
(It got so bad that I decided, well, if the AI can do it to me, why don't I? So I played a game as Greece and had Infantry by the time Turkey spawned!)
So, I think some temporary bonus should be given to new civs to improve their economy until they can catch up to the older civs that haven't collapsed...
Other than that (and the AI asking you to convert every turn

) the additions of the very high/low likeness and the new difficulty levels just made the new mod even more playable than before!