I don't, with or without further integration. Not everyone or everything is meant to survive. Everything has a shelf life. The Roman empire also collapsed. Rearranging the deckchairs of the titanic doesn't change the outcome.
>What is your preferred model? All of us staying in little insignificant countries, kowtowing to larger powers?
A union is good, but the EU only worked at preventing another world war between members, not at helping us be united against foreign entities, because you can't force unity between different dethatched cultures just because we're neighbours, as proven by Yugoslavia, the USSR, etc.
Every EU member is still driven by self interest and own group preference, which will be the EU's doom. Like Spain doesn't really care as much about the Eastern war as Poland or Romania do because they're far away from the war and don't see why they should pay more taxpayer money for it. Germans care more about something happening in Austria than about what's happening in Bulgaria. And so on.