Why would Russia bother going through this again?
Why would that change if he hasn't?
They have their land bridge to Crimea now, and if I had to speculate, they’d be happy with a neutered neighbor that can’t join NATO, essentially a populated DMZ. I can’t see what benefit in wanting to take Ukraine on again after the dragged out meat grinder it was this time around.
Expanded access to the Black Sea and natural gas/minerals were and still are very important to Russia. Aside from these, a total victory would allow Putin to cement himself as a conqueror in Russian history books.