That "depreciating currency" stuff is Keynsian nonsense.

Depreciating currency is just another way of saying you're more competitive when your people are poorer. You can also accomplish the same goal by importing millions of low wage workers to bid down salaries.

And in the end, there's no reason to actually leave the Euro, unless, you want to print a fuckton of money and hyper-inflate. The Euro isn't doing anything that's really actually bad.