Ukraine is at the brink of a humanitarian catastrophe, where Western powers regularly encourage color revolutions bringing the country to a point of civil war. "The west" has virually no skin in the game but leaders would prefer Russia sanctioned and isolated so that once again US has unchallanged superpower status.

Meanwhile, as discussed, Russia, Ukraine and EU have a lot to lose in a devastating and bitter war. At the same time Russia is obliged to keep stability and relative prosperity in the region for its citizens at home and Russian nationals abroad.

The best route for Russia is to defend the status quo as passively as possible while waiting for the Ukrainians to realize that for the "west" Ukraine's destruction is about as good as Russia's. And I think this route is feasible for Putin, so this will happen(not much).