All-out Assault on Ukraine by Russia Before Spring?

Very interesting exchange between Vladimir Kozin, Scott Ritter and Stanislav Krapivnik on whether Russia should finish this war now. Battlefield analysis: Ukraine/America/NATO have already lost this war. Russia is willing to take its time in grinding Ukraine's military to a pulp. In no hurry to sacrifice any more Russian lives. Russia doesn't want to kill Ukrainians either. We discussed the constant escalation by the USA and Russia's tempered responses. American pols and the military know this war cannot be won, but they must save face.