I saw a thing today in which a Russian person referred to Russia, Belarus and Ukraine as a "Triune Nation", one nation with three parts.
So here's my thinking:
Putin seems to have a goal of ending the war on or by May 9, with Donbass to Kherson under Russian control. I mean, obviously Ukraine would not consider the war over by that point and under that state of affairs. But after that it would at least be easier for Russia to proclaim that Ukraine is the aggressor. Russia is already claiming that Ukraine is the aggressor, but if Russia stopped attempting further ground offensive operations the pro-Russian useful idiots would amplify that message even more.
Except - I don't think Russia will be able to get that much territory by then. With Ukraine focusing on Donbass, I don't think Russia will be able to gain more than a small extra bit of land compared to what they have now.
So if the status quo by the first week of May still resembles the current status quo, Russia will need another plan. I think we're currently on Plan D, so call it "Plan E".
Plan E: Start preparing in a few weeks (late April) with more language about the Triune Nation, more of the idea that Russia is more than a nation, it is a civilization unto itself. That builds the stage for Putin to finally declare war. Civil War. He'll admit that a state of war exists but he'll state that it's a Russian Civil war - Ukraine was never a real nation, right? All this is just a civil war between different parts of Russia, that's all Ukraine ever was.
That way he can shift to a longer-term mindset and start (openly) adding (more) conscripts into the grind. And claim that foreign nations have no right to interfere in the new Russian War Sausage Factory Civil War.
The audience for this would be his own public - he needs to set the stage for a long-duration war with heavy casualties and higher rates of military production (although their ability to actually have higher rates of military manufacturing and refurbishing is sketchy as best, especially with sanctions). He would mostly just be prepping his own population for lots of death over a longer period of time.