I don't think that's right. Everythign in the EU is moving much faster now the UK is out. Losing the 2nd/3rd (depending on year & measurement approach) largest EU economy seems like an obvious loss. But with money comes power, and the UK always used its power to try to stop anything happening. It's a shame the UK was dominated by its most intransigently sclerotic constituent nation. Scotland and Wales could both have been effective and useful EU members (and, who knows, may yet become so). England was never going to be, and the EU is undoubtedly better off without it.