Its only prolonguing the inevitable.
Russia is about to send hundreds of thousands in an ultimately futile last rally.
Lots of Russians are going to be fielded with Warsaw Pact era gear, minimal training and bad leadership, then get told to die for Mother Russia (or die from a bullet to the back of the head).
Assuming there's even a year to this conflict. Winter is probably the main reason Russia might get time.
Right now, it's looking like the Ruskies in Kherson don't have long in this world. A defeat in Kherson would be as bad as Kharkiv, and would make Crimea immensely vulnerable.
The Ukranians can simply siege Crimea by cutting off the water, exploding the Kerch bridge and then just sit back and pound the Russians with HIMARS.
Any sea vessel bringing relief gets the Moskva treatment. Between British Harpoons and Ukranian Neptunes, being in a Russian ship in the Black Sea will become a very risky endeavour.
Once they get their manpower nice and tight in fortification to ensure no Russian comebacks, they can send the left-over manpower to where it's needed.
Even if Winter stops the tempo, I doubt the Ukranians will be idle.
If both sides stop for winter, the Ukranians will use the time to get more western weapons and train with more western system.
Who had "Ukranians flying F-16 against Sukhois over the skies of Ukraine and Abrams and T-80s dueling on the Steppe" on their bingo cards? Me neither.
