The thing is, this is a game, not real life. The goal is to make a civilization (hence the title of the game) and what is why I assume you bought Civ 4 in the first place. I agree with you, there are some issues with a couple civs getting out of control and expanding crazily, but we have some ideas about that. We just can't agree on which ones would be best.
I bought Civ 4 because it is an addictive game. I found out about mods, and played Rise of Mankind, which was far superior. However, the games went like this... after a while one civilization and I end up at war. All of my cities had to constantly build units just to keep up with my enemy (because that's basically what he was doing). All I did from ancient era to modern is build units, and finally I obliterated the said enemy, ended up with a few vassals, and had usually one other civ who was any threat to me. Besides that, now I just build up my cites and I will win. I had to wait unitl modern era to build up my cities, and now, by this time... the game was just boring. After a year or so, I would play again and go through the same thing.
This mod brought life back into the game, however, I discovered that it is far more interesting, rewarding, and fun to play the game like it is real-life. I am getting insight on what it would have been like, which I find fascinating. The games are much more exciting when I do that. The other way, I could win every time, but I would gain no satisfation. So, would I rather have more fun, or would I rather just play a game where I already know what I am going to do, and just follow a set order of procedures?
I really like to immerse myself in the game world, and I am really into world history. So it becomes so much more than a game when I play it that way. Not everybody does, but you pointed out why I play it. I play it because it is more than a game because it is like a historic "what if" interactive documentary the way that I want to play it.
You don't have to change anything because of that, but you don't want this game to be like Dragon's Lair arcade either (gameplay wise), because I can easily win if I follow the set procedures (tribalism, chiefdom, send hunters all over to subdue animals, get goody islands asap, archery, and most important build cites like mad and the buildings which give the most money). By this point I have already won the game and am building most of the wonders)... soon after I am building all of the wonders, and can knock off civs easy with units that are far ahead of them. That gives me even more power and game over half-way through the game. One thing about real-life is that it places limits. It keeps you having to stay on top of things. Any super powerful civilization in real-life was never safe, because even some weak civilzation can all of the sudden arise, and destroy you (Macedonia over Persia, Rome over Carthage). That can never happen in this game. If you are on top, it only becomes easier. The more powerful you are, the more you gain.
I would suggest that number of cities increases problems, culture helps build research, a city has to be over-populated before they even consider expanding... actually I would use real-life as a template because I think provides the most amazing challenge and keeps everything the most interesting. Just imagine how much more fun and exciting it would be to take an empire from scratch to greatness in a realiistic simulation rather than like a game. Just my opinion I know, but just putting it out there. I appreciate the mod, just that it is far superior when I play it that way, and this mod has so much potential.
PS, still the marble next to my city hasn't been revealed and I have sculpture, hard-hammer, and masonry. What tech does it take?