You forgot that in your TL Austria and Prussia are still allies of France. Which makes (the big players):
(a) Two
formal enemies, Russia and Britain
(b) One
very reluctant ally, Prussia
(c) One
very cautious ally, Austria
Britain - restoration of the Spanish Bourbons, French evacuation of Spain and abolishment of the CS (which would be lauded by most of Europe). Demilitarization of Antwerpen. Britain returns some of the captured French colonies
including Guadeloupe.
Russia - abolishment of the CS, French evacuation of Prussia, restoration of Oldenburg and a proposal to discuss the “Polish issue” with a hint that France is sympathetic to the idea of making the Duchy a Kingdom and Alexander its king.
Prussia - removal of the French troops from its territory and discussion about return of some lost territories (at Westphalia expense?). All this goes as a reward for a loyalty (blahblahblah). If Taurogen already happened, asking the King of Prussia to pardon Yorke (nice gesture toward the Prussian military) and offering participation in the discussion regarding the fate of Poland. Prussia is not, yet, in a position to demand a piece of Saxony.
Austria - in this schema little or nothing except for the territories which are meaningless for France outside of the CS framework, the Illyrian Provinces. Having half-Hapsburg on the throne of France should be compensation on its own and Austria is isolated, anyway.
Sweden - gets back Pomerania and receives Russian, French, Prussian blessing regarding Norway. Probably the Brits would not mind either. Instead of the foolish game of getting and selling Guadeloupe Bernadotte is receiving a lump sum of money as a compensation for the lands and revenues confiscated by Napoleon (perhaps Desire gets some nice rent “under the table” and a better residence in Paris). Off he marches to have his little victorious war (France, Prussia and Russia can press Denmark diplomatically but perhaps even this would not be needed).
French border is on the Rhine, Holland is independent (but signs an agreement regarding free navigation on the Scheldt), the rest goes either to the old owners or to Prussia as a compensation for the Polish lands lost.
No real need in Vienna-like conference, just bi-lateral talks with Britain and Austria and tri-lateral with Russia and Prussia. No need to bother the Poles with the unnecessary details about their future and realization of these plans is going to be Alexander’s headache. 😂 If there is a general conference, it is
not in Vienna and France is generally sympathetic to the Prussian demands, within the reasonable limits, and to the Russian plans regarding Poland. Britain does not have too many subjects to bitch about (Hanover? Talk to the Prussians) and, with the happy Russia and Prussia, it is pretty much marginalized. Austria is trying to be on both sides but, with the other big players being reasonably satisfied, it is more or less marginalize.
Slogans of the new reign: “Empire is peace” and “All that is French must be in France!” (*) - which justifies border on the Rhine (the natives on the left bank were under the French rule so long that they are practically French)
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(*) Stolen from “The law is a law” - a movie that provides a comprehensive insight on what is “French” and who are “Frenchmen”.