To unite Europe with military force-
In the last 200 years, there were three experiments that intended to unite Europe with military force. The three of them were disastrous and each one in the sequence was more disastrous than the previous one. None of them have done any good to unite the fractionated European states, or mini states. The only successful experience of unification was with unification of Germany and Italy, that happened almost without wars and in Germany it started with economic unification.
The EU experiment is all about to prevent the fourth experiment of unification by force. You criticize the technique, as not the central issue. But this technique is all about how detour every obstacle in the way to unification, without to fall into the hole. If you put on the negotiation table the issue of limiting the authority of national state, and bring the politicians elected by nations to decide about it, the EU experiment will come to the end. The only way to overcome the obstacle of the national states, is by tricking these politicians, threatening them with the very worse scenarios of economic collapse that could have grave personal consequences for them, and slowly – slowly pull out the carpet under their legs. Everything is better than a fourth experiment of unification by military means.