Specifically, the European Union isn't even attempted. Would Europe be better off, judging by how the project worked out now? Or did the EU bring benefits we forget because of the crisis occurring right now?
Curious about your thoughts on this.
First we have to define what "the European Union isn't even attempted" actually means. If we take it to mean the 1992 Maastricht treaty is not signed then...well, what happens next? OK, with it we had the Scandi's joining/trying to join in the 90's, then the Euro started in 200blah, then the A8 join in 2004, then Romania and Bulgaria join in 2007, then the banking crisis hits, Iceland tries to join, thinks better of it, Eurocrisis hits, expansion slows and stops, with Turkey perpetually frozen out, the remaining former Yugos start twiddling their thumbs or (like Serbia) thinking of getting closer to Russia, and nationalist sentiment rising with several states either idly considering leaving or (in case of UK) genuinely considering it.
Sans Maastricht, what happens instead?
Some of the expansion was driven by the collapse of the cold war, so the Scandis would still probably have joined (ironically, Norway would be more likely to join?). The present Europessimism is the handmaiden of the early noughties Euro-optimism, so no Euro and less economic exuberance between 2000 and 2007, no Celtic Tiger, and so on. Greece doesn't expand so dramatically between mid-90's and 2009, but conversely doesn't collapse as far either. Economically it would still have grown but not as fast nor as far, but would not be undergoing the current wild ride either. So economically you would still have the sine wave, but less dramatically: standards of living would be less than now
Geopolitically? The lack of the urge towards unification makes the bloc less blocky...there's no guarantee the former Yugos and Warsaw Pact countries would be in the alt-EEC/EC, and we may see several overlapping mini-unions (the Mediterranean Union was formed as a way of cooperating with Northern Africa nations without letting them join the EU) instead of one big one
So: no Maastricht treaty, no European Union, no Euro, our alt-EEC has less than 28 members, there are instead a alt-EEC with ~15/18 members, an Eastern Union (the former Warsaw Pact countries) as a buffer to the resurgent Russian Federation and its westward expansion. No big expansion 1995 to 2008 (so living standards less than now), but no Eurosclerosis either.
The Balkans still a mess (what happens with Croatia? Dunno). Greece is nowhere near as big as it is now and carries on quietly, devaluing once or twice each decade, nobody knowing or caring. The Baltics may have fallen back into the Russian sphere by now (something they are terrified of in OTL).