It would have been better like this. Then Germany would be much cultural. That is how the TRUE 1989 German Re-Unification should have been. Who knows? Maybe Pommern, Schlesien (or at least Niederschlesien) and Ostbrandenburg will be returned to Germany, their RIGHTFUL country, one day.
I'd actually approve of this. Germany is very culturally heterogenic, but if you'd split it that way, the cultures in the individual states would be more unified. Now the question is if that is a good or bad thing.