Pedro. The EEC, plus some additional institutions, have the most benefits to all members.
Everything else you add, such as an extra language, makes integration of these 27 very diverse members more difficult. To my knowledge no-one speaks latin or esperanto.
If you are afraid of being subjugated, look at the Global Competitiveness Index.

You also see the an democratic expansion of the EU. In the EU France and Germany comprise 34 % of the population, with two leaders making the major decisions tete-a- tete. The majority of the Europeans are not represented. I think the EU is a Franco-German cooperation rapidly developing into an autocracy. With France isolating itself evermore in the World.