EU 2.0 or game over!

Is it enough to avoid GREXIT & BREXIT to put EU back to its tracks or do we have to restart EU from the very beginning?
And if so, is it feasible with the current head of states?
And to indulge you more what if the next governments turn left and others turn far right?
Is this the paneuropean scenario of a 1936 Spanish deja vu?

http://www.project-syndicate.org/commentary/grexit-brexit-europe-anti-europe-by-joschka-fischer-2015-05