Listen to yourselves people!
Does anybody actually realize what exactly they're arguing about here? I'm going to attempt to straighten this out once and for all.
Despite the fact that the writer quoting Jeff Morris may have accidentally typed "civ" instead of "city", (which would be extremely unusual), I am willing to guarantee that it was not a typo. Look at the text that he wrote previous to that quote: "As we continued looking at the editor, Morris touched on the ability to flip civs to your side via your civ's cultural status."
Now be reasonable guys, do you really think the writer of this article would accidentally type "civ" in place of "city" twice like that?
Get over it, there is clearly no doubt about it that the new feature is flipping civs NOT cities. Besides, as Yzman has already stated perfectly, flipping cities has always been, and this article is obviously talking about NEW additions, not recapping on current Civ3 features.
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Great, now that that's done I can get to one of my ideas that I feel Civ3 should have...
Am I the only one who says "What?!?" to myself whenever one of my Modern Armours gets destroyed by a Pikemen or Spearmen??? Doesn't that seem just a little inaccurate? huh? I'm sure others who have managed to advance their civilizations much past their rivals have noticed this rather peculiar phenomenon. Unless there are 100,000 spearmen to one tank, I can't see any damage whatsoever happening to the tank. Which brings me to my addition:
Units in the Civ games should have a sort of "Weapon type" and "Armor type" property. Meaning that every unit should have an immunity to certain types of weapons depending on their "Armor type" property. A tank would have a "Steel Frame" or "Metal Frame" type armor or something similar. Only "Explosive" type or similar weapons such as bullets and rockets can harm it. These weapon and armor types can be applied to units of all eras.
Some may argue that these "immunities" would make the game too easy, but think about it; if you are good enough to advance greatly beyond your rivals to develop weapons that are invincible to primitive weapons such as spears then you should seriously consider upping the difficulty level a tad, which is what I do. Adding this essential element to a future Civ game or perhaps even an expansion would by no means make the game too easy, it would rather add a fundamental aspect of realism that I feel would benefit the game substantially. I don't know about the rest of you but if I'm able to surpass my opponents technologically, I would want to reap the fruits of my labor by completely obliterating them with an army of machinery that can't be scratched!
As with all fundamental features, there should be an option of enabling/disabling it. Not everyone wants to play realistically!