Germany was broken down for a few decades after WW2, and it went pretty damn well.
There were, uh, extraneous circumstances in comparison to WWI. You know this. Half of Germany being occupied, or territorially obliterated, by the Soviets, and fear of Soviet vengeance kept West Germany from contemplating a rebellion as much as Western Occupation did.
That is not possible, as you'll just ignite hatred on a level you haven't seen before. Prussia owned half of the Country when Imperial Germany was founded after Franco-Prussia, and Imperial Germany became a thing because of the French having the past time of fucking with the various German states for centuries.
Not only that, but you'll set a very dangerous precedent for future wars. Hell, Versailles was almost rejected by Germany as it was mind you.
You should remember, I'm not suggesting the Brandenburg part of Prussia and all the other little Princedoms join Prussia, I'm explicitly advocating turning Baltic Prussia into a rumpstate on the outside looking in. And as far as hatred goes? The Prussian method of "diplomacy" and geopolitical strategy began breaking down as soon as it succeeded in the goal of uniting Germany. It wouldn't have been hard, even then, to craft a narrative a poor Prussian leadership squandering a united Germany.
Letting Germany stay united, and in fact forming GrossBDeutschland minus Rump Prussia and Alsace Lorraine, lumping Austria in, would do a lot to alleviate potential revanchism. And with the biggest player in that, Prussia, being explicitly exiled from the German political scene, it might not ever get started. The only better solution is the outright arrest and seizure of as much of the Prussian aristocratic state as possible, 100,00 men I think at the upper core levels, giving Prussia, including all of the Vistula drainage basin, to Poland in exchange for the other areas of ethnic German supermajority remaining part of Germany.
We signed that treaty because the German military was crushed in WW1. The error was to not go for keeps and actually go to the capital. Because, no, Aaron, the Kaiserreich was not something worth preserving.
A United Germany where German speakers could live in relative peace was something worth preserving. A Prussian meatpuppet behaving like Poland and Sweden at their most shitheaded was not.
The thing was that Post WW2 Germany was flattened, WW1 Germany wasn't.
WW1 Germany was starving harder than WW2 Germany by the end, what with not being able to loot vast quantities of Eastern Europe and use concentration camps to reduce the number of mouths to feed for as long as Hitler's reich did. They had only just gotten started on the Ukraine when they shifted everything west. Had Germany pressed on, it faced total collapse.