Just playing devil's advocate for the fun of it...
Why not just up the civ list a lot, make each country in Europe...give them the correct relations, etc...
What happens, in real life, if the resources start dwindling crazily (since we are discussing attempting to make resources disappear over time in this mod), and one of the more powerful countries in Europe decides that its time to expand borders to capture more resources to maintain their population?...
I bet in 1925-1930+ no one would have/could have predicted the rath of Hitler's war in Europe...
Who is to say that it can't happen again with oil/natural gas reserves projected to be depleted by as soon as 2050-2100?...
Lots of things can happen in the future...why take out any possibilities?...who could've projected the USA becoming truly a pre-emptive first strike country and not a reactive country?...Resources start dwindling, and people start clamoring for help...don't be so surprised to see a tyrannical USA going full-board into the middle east (already into Pakistan to surround Iran)...
Maybe a leader in the UK will give patriotic rise to nationalism ferver to re-build the empire...
Nothing is impossible...why not simply end the argument and simply build each of the Euro countries - yet simply give them the relations/pacts that represent their Eurozone nature in today's world while leaving open all possibilities that come with frenzied human behavior in times of crisis that may very well truly approaching in our childrens children's days?
Never under-estimate the feeling and use of Nationalism by leaders in a time of panic and crisis!
http://www.youtube.com/watch?v=F-QA2rkpBSY
(Not at all that I agree with this video 100%, although it does have some creedence and is an interesting watch to those who have the brain power to actually understand mathematics (and this video just adds steam to my playing devil's advocate)) - so please don't bog me down into taking that video as an end-all-be-all. Just having fun with you guys while trying to make my argument seem more valid.