I agree on the backdoor negotiations. This is a "goodwill gesture" to give Ukraine a face-saving "win" before it ultimately accepts an Unequal treaty on Russian terms, namely formal recognition of DNR/LNR/Crimea and a neutrality stance. The problem of this strategy is if you cede one inch, the Ukrainians will demand one mile, which explains Zelensky demanding the entirety of territory taken since Feb 21st to be returned. I wouldn't be surprised if more territory is ceded by Russia as a "goodwill gesture" as part of negotiations. The core of S.M.O. has always been Donestk/Luhansk, the other territories in Kherson/Zapo are nice-to-have, captured at little cost, and entirely tradeable on negotiation table.