The EU was never supposed to be a Federation, with the sovereign nations surrendering their own interests to a central government. Supposedly it was a 'free trade' zone set up to get around the problems created by corrupt national governments. Apparently the solution presented itself as an ever bigger corrupt government, trying to do the same thing to get different results never gets old.
Of-course now that UK leaves the EU the others will be looking carefully at their success, and it should be a success. UK will continue trading with EU just like all the other countries that are not part of the EU that are still trading with the EU, except now UK will not be dictated to by somebody who doesn't have the interests of UK as their main agenda.
Others will follow, the question remains: what will Germany be doing when it is the only country with a working economy left in what will become of EU. Germany and Greece is not really an entity that screams of balance.