I think part of the problem is the limited number of attribute types, and what adding ones, plus some research tweaks, could do to game balance.
Some nations could or should be labeled "Agricultural" (bonus to food production), or "Artistic" (happy face bonus), Inventive (rather than scientific) would have a minor research rate reduction instead of lower science building costs, "hunter" (more food from forest and game tiles).
For further example, China would get my "agricultural" attribute, Rome (or more properly France and Italy) would get "artistic", the U.S. would be "inventive", Iroquois and (maybe) Zulu would get the "hunter" one.
The game is good, but they did leave out a lot possible individual nation attributes.
Russia too. I can't think of a term right off hand, but I can see the Russians getting a bonus on tundra, Persia and Egypt getting one on desert, etc, etc, etc.
I'm sure other posters here could add dozens more like those above.