It will go where its leaders want it to go very very different, you seem to be in total denial as to the history of where it has gone from the original iron and steel group, via the eec, common market to the eu , how many times has the uk had a vote on the changes, how many times did Ireland, they vote no and were told to vote again and give the right answer, several other countries voted things down but there you all are with them slipped in bit by bit, were the french asked if they wanted the euro ? We were lucky that brown talked Blair out of us joining, I have never seen a suggestion that we would have been given a vote on it, there isnt much more central to a country than its currency.You have answered you own question. The EU will go where its members want it to go, which maybe closer integration or less , but its sovereign member states will still retain their identities. The important thing is that the EU and the US maintain their dominant positions in the world as the places that make and set the global rules and standards. If they weaken, these centres of power this will slip into the hands of the growing Asian superpowers and Russia, which I suspect will be bad news for all democratic countries.
I don't have a problem with a European force, after all we have be quite happy for sixty years with a European force (Nato) which is controlled by a country on the other side of the world.