There should be two different rule sets.

One for advanced users. Things like: supply number on oil(ect.), this idea (http://forums.civfanatics.com/showthread.php?t=111600), supply lines for your army/navy, and many more that listed here

Also, the base rules. Like Civ3 for the base civ player that like it simlpe as it can get.

Tell me what you think.

arkammler

Sound good to me

Why not levels of difficulty based on rule settings? Player combat values could be slightly increased on the easiest level, they could have increased trading skills (AI more willing to trade), extra culture, easier to research, and maybe a movement bonus. In medium, it would be standard rules. On hard, you would get penalties in these areas.