For the division of Germany what about dividing Germany, and Austria, into two. First off, Prussia is abolished and East Prussia is handed over to Poland.
Then a North German Republic is established with:
Brandenburg
Westphalia
Rhineland
Hesse-Kessel
Mecklenburg
Oldenburg
Saxony
Thuringia
Schleswig-Holstein
And a trimmed down Silesia and Pomerania
This nationd would be divided into occupation zones between the commonwealth, the Netherlands, Denmark, and Belgium.
The other nation would be a South German Republic initially occupied by the French. Maybe the Hasburgs and some of the other royal families could eventually be restored too. This nation would consist of
Austria
Bavaria
Baden
Wurttemberg
Palatine
Saarland
Hesse-Darmstadt
And the city of Frankfurt to connect Hesse-Darmstadt's north and south parts
This would weaken both Germanys weaker than France and would restore the centuries old division of Germany along the mostly Protestant North and mostly Catholic South.
Besides that, the rapid collapse of the German Army is great from a propaganda standpoint. Unlike after WW1 there won't be German Generals strutting around and blaming the Jews, communists, and others for what happened. Second, I think PDF27 has mentioned that the Allies are still going to dismantle the Juncker's as an influential class in both the German public and also in the Army. With their dismantling the German militarism that the world has come to know and love, /s, would be gone just as much as OTL.