Everything and immediately, is generally how it works. I think Ukraine should demand more than returning to the pre-invasion state. I don't know exactly what,

Everything and immediately, is generally how it works. I think Ukraine should demand more than returning to the pre-invasion state. I don't know exactly what, but it seems like they should shoot for some verifiable changes in Russia's government, laws, military, or the like, and tie them to milestones for sanction reduction. If nothing else, that might help anchor negotiations in Ukraine's direction.