eastern europeans will see the cold war in a differen't light, since they will more and more realise that they got screwed by a banking cartel after cold war.
europe needs the EU to end the area of nazism and make cross border corporation possible.
europe currently suffers from imported nazism
Countries in Eastern Europe are most pro European Union countries in EU - https://en.wikipedia.org/wiki/Euroscepticism#/media/File:Poll_about_perceived_EU_balance_benefit_(2018).svg
Are there a lot of people from Eastern Europe emigrating to the West ? Yes. Because of the wider carrier choices, higher pay and living standards, different social standards, better education. But it doesn't mean that all of them stay abroad. Some countries like Lithuania started to see net positive immigration in the last year. Some emigrants eventually decide to come back. When they do come back, they bring money, knowledge, ideas, connections and etc. Only because there is a population drain in short term doesn't mean it will persist. We don't live in a vacuum.
Additionally, countries in Eastern Europe lately see high immigration from Ukraine, whose people come here for the same reasons Easterners go to the West. And it's great, freedom of movement is great.
Eastern Europe under EU prospering as it never had before. The biggest problem of Eastern Europe is its Soviet heritage. But trust me, younger generation are very keen on getting rid of it.