Uf, it will be difficult to explain MY OPINION with my poor english. Also is not the thread to do it.
IMO, politically speaking they don't do politics (in the big scheme of things) but what economically suits better the private sector and the politicians that they are bind to them. When everything goes right, we are europeans. When it goes wrong you are German, you are greek, you are brittish, you are spanish, etc...The austerity rules applied in europe during the crisis for example. In Greece had been draconian. Instead of treating and reacting with it as a part of you (EU), the EU treated Greece like something external, not forgiving anything, not reacting in time and pressuring a lot while the referendum that took place in Greece not respecting at all the sovereignty of a member. Even so the referendum was won by the ones that they did not want a 3rd rescue plan, but the greek government cave in because the EU gave no other option. I read some things about Varoufakis and how the EU worked, and it was appalling.
That is just an exemple. Others like the international policy on the middle east, the way we treat refugees and immigration, the way they tried to feck us over with the CETA and the TTIP with secretively negotiations, the recent law that they past about internet, etc...
Is an excellent economic union area that is becoming more and more dangerous because is eroding little by little the social welfare of the european states in favour of the neoliberalism.