I begin to see, I think. What is sought (or what you propose) is NOT a United States of Europe, ala the USA, nor a Confederation ala Canada - in fact, such seemingly copy-cat imitations rub Europeans the wrong way, and work against unity - but more like the idealized (but never realized) Union of Socialist Republics. A UIESR (union of independent european socialist republics), so to speak.

I agree, a continent-wide referendum would be unwieldy and unfair. Maybe nation-wide referenda with each current nation having equal weight?

Anyway, the way forward: scrap Lisbon, and start over, or try to fix broken Lisbon; in your opinion?