In an era of global challenges, this longing for profound national sovereignty seems to be somewhat reactionary. Of course, there are tasks that can be done better at the European level than the national. Conversely, there are tasks that are still more at home at the domestic level.
Looking at the resurgent debate on the future of Europe, what I feel really counts is deciding, as a first step, whether there are any additional responsibilities that would make sense to transfer to the EU. From an economic standpoint, these might include Europe-wide public assets and policy areas with cross-border externalities, in particular.