Except that's the wrong way around. What you should be looking for in that case is greater granulation. The EU is a bigger something, not a more spread around something. I can see where you get the idea, but the actuality is that the EU will be unified under one leadership. Rather than spread, the centralisation will be increased.
Somebody suggested that we should further split up the countries into tiny states. So we might split down to counties in the UK. It would allow easier movement to states that might have preferable conditions. Each would have its own budget, taxation system etc. it would make wars more difficult to start, if we no longer had a UK as such. That's just an idea, but I can see why greater granularity would make wars on a grand scale, or dictatorships just about impossible.