As a side thought, I'm anything but sure if at any point Napoleon's goal was a complete destruction of Hapsburg monarchy. Cutting them down to size and minimizing their influence in Germany and Italy, yes, but that's pretty much it: he never seriously entertained creation of independent Bohemia or Hungary even after Austerlitz he was in a very good position to do just that, at least for Bohemia (his army was occupying it and Austria was left without an army). Can't tell why. Perhaps because, being a parvenu, he was sucking up to the "Great Dynasties" (does not apply to the Hohenzollerns who had a rather low position on a totem poll of the HRE whatever was their real power; IIRC, after unification of Germany some minor German princes refused to visit the imperial court considering themselves more aristocratic than the Prussian upstarts).