Didn't Bismarck himself provoke the war with France, though?
Not really. He desired war, but so apparently did France.
Your proposal isn't very different from Grossdeutschland, though.
It is Grossdeutschland, indeed.
Anyway, how does this partition look like: Germany gets Czechia and German Austria (including Burgenland), Italy gets the Italian-majority areas of A-H and perhaps Dalmatia as well, Hungary becomes independent but loses Transylvania (which is annexed to Ottoman-vassal Romania), and Russia annexes both Galicia and Subcarpathian Ruthenia?
Indeed, is that spot-on?
Possible. I doubt that Bismarck would push for Burgenland, and Russia may conversely renounce Transcarpathia (essentially, it depends on what the Hungarians leaders do). Both, however, are possibilities. Also, I see hard for Italy to get all of Dalmatia.