[HangFire]

First I've heard of the Euro Constitution thing, but I guess its purpose is just to make the cooperation and unification "official", and in writing.

One potential disadvantage I can forsee from unifying Europe entirely is smaller nations getting a bad deal out of it, the larger more powerful nations would have all the say.

That happens all the time, the western provinces of Canada get routinely screwed over because of less population compared to the east. Politicians serve the area where the majority is, more votes.