I just realized, if Prussia is too weak to do anything, and Napoleon III is still in power, I think personally he might try to annex Luxembourg like he tried to do after the Austro-Prussian war. France in Europe might want to go after a few Microstates, like Luxembourg, and Andorra, and try to gain as much land without angering anyone. France, under Napoleon III, will probably ask for reparations from Germany and spend it on infrastructure projects.
Germany might be threatened to start forming alliances earlier. Probably with Austria-Hungary, but maybe the Ottomans even earlier, in the 1870s, or 1880s. Since Abdul Hamid II is still in charge, Germany might be inclined to start helping with Ottoman modernization far earlier than previously. Especially if France is even more of a problem, Russia will be an even larger factor to worry about, especially considering Russia's economy is growing faster than ever if the Ottomans can become self-sufficient, Germany could get Austria-Hungary, and the Ottomans on Russia, and send all the German might on France.