One way to go is to start again with a smaller group of countries, if this what you mean. Another way to go is to try and make of the current EU a true democratic space, with a president elected by the people, pan-european parties and the likes. None of these options seems easy right now.
The default is the present progressive decay of the institutions, laws, budgets and "spirit" that constitute the EU.
I guess there's a final possibility that europe will "rebound" in its present form, survive the refugee crisis and ISIS and Putin's intimidations and the debt nightmare and fidle through with a renewed commitment to the block's collective destiny and all that... It's not totally impossible but the clock is ticking louder and louder.
What I hate the most about this situation is that i am forced to reckon that Le Pen and co were right all along about this Euro construct. It's just too big.