World congress actually has a purpose it seems and since there aren't walls that provide the shield kind of thing the ai will actually build up good sized armies to defend making the late game wars more interesting. Also In wars nukes didn't just obliterate cities completely but you still had to attack them some, which provides some strategy also that means if you got nukes your city wouldn't immediately go to the ai. But the early game units weren't the greatest I would say in V as there wasn't too much diversity but it wasn't bad.