Would the PIIGS nations benefit from an exit? Seems they’re part of the problem, tho nothing compared to the mass, unfettered and outrageously expensive migration into Europe.
In my opinion yes, with the possible exception of Ireland. The poorer Southern countries would benefit from reverting back to a local currency which can be revalued to account for current economics. For example Greece tourism and exports would boom if their economy was valued in Drachmas rather than Euros. German appliances and French perfume would cost a fortune but that's not really a core issue.