My point is not they must be "homogenous" by any means but should be well-themed. Yes, you are right you need some degree of abstraction. That's a very good point. It was all started when I pointed that people were mad (you would say in a strange Taliban manner) about the Celtic blob (which is some degree of abstraction), but has no problem with the Italy blob (which is also some degree of abstraction). I just don't understand those double standards I have pointed it and then the discussion started. In my opinion degree of abstraction in the case of ancient Civs, about which we don't know really much can be more liberal, but in the case of modern history when we have some interesting recognizable Civ and we want to put it with the others (sometimes even minor) into one basket is not even a blob, but just a waste. And this is the whole point of the Venice vs. Italy case.
As for modern states being key markets. I know, I fully agree it's a thing, I am aware, but I may not like some things here. Following blindly this path we can someday reach the point where we (or Firaxis to be more precise) will start to consider what Civ we want in a game modern Mexico or Aztecs. And you know what is the funniest? I wouldn't be surprised if the main argument here against Aztecs would be they are a blob, really

So as for my "complains", this is it.