There are are reports on Oryx that a fifth Russian general has been killed, which if true is a terrible attrition rate in three weeks. The German army also had an incredible loss rate of generals towards the end of the Second World War and it seriously impacted their effectiveness. The losses seem to be brigade level commanders leading from the front. Although in the fog of this war what is the front line and who is on your side is somewhat blurred as not all Russians seem to be willing participants.