BRUSSELS – The Brexit drama shook the foundations of the European Union for years and laid bare the need for much-delayed political renovations at the 27-nation bloc. But now that Britain has finally left, where does the EU revamp even start and who is going to foot the bill? Those questions loom large for EU officials and European leaders alike, because substantial structural changes require some common vision of what a future EU should look like. Yet even without such unity, the bloc is already a major construction site – with changes pondered in foreign affairs, business, defense and enlargement into the Balkans, just to name a few projects aimed at making the EU reach its full potential. The clamor for change has come from both outside and inside the bloc, including from French President Emmanuel Macron, EU Commission President Ursula von der Leyen and the new EU foreign policy chief. “It all requires a renewal of the European approach,” Macron said.