Would this actually be such a bad idea if all parties were still part of some supranational entity like the EU with some level of free movement and common regulation?
I actually would like to see this type of balkanization happen while still keeping everything inside the EU, incl open borders. This was actually the idea of the early Pan-Europa people... As it is right now, the population heavyweights in the EU have way too much say compared to the smaller states.