The UKs MoD assessment is that Russia is sustaining devastating losses:
https://twitter.com/DefenceHQ/status/1531143716840284161
Those are quite the numbers:
As at 30 May Russian senior officer losses:
- 1 Admiral, 23 Generals, 1 Lt Colonel and 150 FSB officers arrested/suspended;
- 13 Generals KIA;
- 29 Colonels KIA (+1);
- 51 Lt Colonels KIA; &
- 8 Navy Captains KIA
I think at this point the Russians are blowing their last load, and when this current assault is over, they'll be pretty much done. It seems that Putin's plan is to gain ground then claim it as Russian, but I think no one is going to recognize that as a legitimate claim. There should be no impediment to Ukraine taking it all back, even if gradually.
I'd love to see Crimea, Donbas, and Transnitra cleansed of the Russian occupiers, which I think is not impossible in the long term. I think Russia has rendered itself somewhat toothless in the course of the current fiasco.
Perhaps wishful thinking.