Another one is I wish Austria still had access to the Adriatic sea.
Oh me too
In addition to much of Silesia and Pomerania going back to Germany, how about the northern part of South Tyrol going back to Austria,
Why just it's northern part? South Tyrol is 70%+ German speaking well until the Southern border, safe for Bozen and a few other industrial towns; and it would make no sense whatsoever to split it somewhere in half (less even if you consider that there is no connection but one 2000 metre mountain pass between its Eastern and Western part other than Bozen).
Now, it would make more sense to split the region Trentino-South Tyrol in half, with its northern part, which is South Tyrol, coming back to Austria (and really, no one but some crazy Italian nationalist could have seriously opposed this until the 70ies), but anyway, today is today, and with autonomy and European idea and all, I'm neither the biggest fan nor the biggest opponent of border redrawing in that case.