Simply no German unification is something I rarely see in a TL, although this was as some nobles around Napoleon's era have thought, would never happen anyway, the cultural differences were very big, and the country was divided by religious, geographic and ideological lines.
I mean, if you'd butterfly the unification of the House of Brandenburg and Prussia away and have the Habsburgs less powerful by just not getting access to both Bohemia and Hungary, you'd have a mixed carpet of almost equally powerful duke- and kingdoms like Bavaria, Austria, Bohemia, Württemberg, the Saxonies, Brandenburg, Hesse etc. who may live in a somewhat peaceful equilibrium until the modern age with some sort of German Confederation or an HRE revised as a defensive, political and economic union between the German counties and states. Sure, there would be trouble once an unlucky death occurs that would pull many states into war against each other, but well, I guess that would be a matter of a TL.