To conclude, Mercouris mentioned this shuffling around of the present Stavka (thread/vid post above).
From memory, during WW2, this type of shuffling around of generals in Stavka was normal, an example being Zhukov and Chuikov (i.e. different strokes for different folks etc.). Due to historical ignorance and spin this becomes 'Russkies are losing' meme in the msm.