however the situation after the break up of Proto Uralic, during the Finno Permic stage, may already have been somewhat different?
It's too difficult for me to connect genetic components to different stages of Uralic languages evolution, i'm not a linguist. So i'm not sure, it is possible the process of Uralisation was very complex and complicated.
Srkz, pls check Fig 4, Admixture at K=3. It sort of reminds me of your great IBD-map?
Yes i remember this article. In fact, some of the samples i'm using (Izhemsky Komi, Mezen Russians etc) are from another article of this authors. Do you mean K=4, where the "Komi" (red) component appears? I think the North-East European Pole of genetics diversity from this work is a combination of my IBD "Komi-related" component, Volga/Ural/Western Siberian component (as you can see, no populations from Volga-Ural or Siberia were used), and heavy genetic drift of the Izhemsky Komi. This Volga-Ural-Siberia component is a compination of ANE-rich paleoSiberian hunter-gatherers and East Asians.
PS i plan to read the Rjabinin's article, a bit busy now.