No. Forreal. Want me to go on?
I haz some minutes (waiting for a render so).
So here's the big problem within the Euro: Germany and other countries of the so-called "core" have too much productivity when compared with the PIIGS, however they do not like a debasing-the-currency policy (aka inflationary policies), which is what it would take for a synchronization of all european economies (increasing wages of Germans while maintaining wages of the periphery). Right before the fan was hit by ****, the peripherical countries were buying and borrowing too much due to the historical lows of the loan yields. In 2009, Merkel made a very infamous speech in which she declared that each country should face their own banking problems, and when the markets slowly figured out that she was speaking for real, all the peripherical countries' borrowing yields skyrocketed.
Without the Euro, what would normally happen would be that the countries with productivity problems would devalue their own currencies against the Mark, increasing their own productivity against Germany, empoverishing every citizen by an equal amount. The pain would be sharp, but quickly dealt with. However, Portugal, Greece, etc., cannot devalue their own Euro against Germany's Euro right now.
If Germany left the Euro, all the remaining countries could devalue the Euro against the Mark. Given that all debts are issued in Euros, this would in turn solve the debt problem by itself. The countries could abandon their austerity measures and start more Keynesian measures for the prosperity of the economy (one can include in these the lowering of taxes, for instance). The Mark's slow rise against the Euro would stop the latter of devaluing too much, since a freefall of the Euro would mean the total destruction of Germany's exports for these countries (still a majority of its exports). The Euro would be, in this scenario, balanced by the Mark.
All this precludes many other discussions of course. It's just one scenario. And between them all, this is one of the most positive ones. The one which we are currently facing is far, far, far worse. A continuing of "doin nuthin, whistle whistle" will mean the perpetuity of austerity measures and the destruction of the welfare systems of the peripherical countries, a massive unemployment that will create an immense rise of inequality. We have all seen this before, in every single country the IMF has bothered to enter into.