Humm. Hoche is more likely to be loyal to the "Republic" than Napoleon, but I suspect he will be no less inclined towards assuming a position of absolute power. So, something more like the Consulate than the Empire?
In OTL He set up a Cisrhennian Republic, and there were proposals for a Swabian one alongside it.
So, maybe France doesn't get its "natural borders" in the Rhineland?