I'm really curious what Putin's end game is here. A complete takeover of Ukraine would result in crippling sanctions that would basically collapse the Russian economy. Their stock market and financial system are already taking massive hits. Being cut off from technology and western finance is devastating this day in age.
If he decides to occupy and annex the "breakaway regions" but stops there and lets things quiet back down, I could see the west easing sanctions wanting Russian oil and gas to flow freely. But what damage will the Russian economy take before it gets to that point? Even this, which is probably the best case scenario for Putin, is a massive gamble. If the Russian oligarchs get their pocket books squeezed too hard they might decide there's a better leader to back than Putin. That wont end well for Putin.
The rhetoric by Putin has me concerned. The nonsense about cleansing Nazism from Ukraine hints at a takeover and either regime change or else annexation of the entirety of Ukraine. That's a concerning development from a guy who has said the fall of the Berlin Wall was the most traumatic event of his life.