The euro in the pockets of 350 million Europeans from Dublin to Nicosia is among the EU's most tangible achievements. Nearly wrecked by a sovereign debt crisis 15 years ago, it's the fruit of a three-decade process of banking and monetary reforms that remains a work in progress."Fundamentally, the EU struggles to concentrate on many crises at the same time," Enrico Letta, the Italian ex-prime minister who last year presented his own report on reforms needed for the region's single market, told Reuters.Propo ...