So basically Ukraine will shrink?
Ukraine has not been a stable country since 2004 and the Orange revolution. And since the Maidan protrests, it has defacto shrunk already as
the Douhansk/Lougansk are separatists and Russia has illegally annexed Crimea. This would formalize what is already real life.
Gives Putin a pyrrhic W and gives Ukrainians a moral W (no ground actually lost in battle). Honestly, I can only see worse outcomes.