Life improvements is not thanks to EU. It was already improving fast before EU membership. It's just returning to normal state before soviet era. Moldova have other issues (Padniestre/Transnistria). Albania was much worse in pre-1990 too, so naturally it will take longer to catch up.
A I'd even say that EU membership slowed it down. We're curbed by same regulations that is forcing West industry to Asia. Local businesses are acquired by West companies before they develop R&D to compete with West. And we can't safeguard our markets to give breathing space to local companies. On top of that, a lot of EU money were pocketed.
After membership fees, money syphoned away by corrupt politicians, EU money flowing back to West because we can't guard local companies etc, I don't think EU is beneficial to East. IMO we'd be better off had whole ex-Warsaw-pact stayed away from EU for couple decades. NATO is damn nice though.