Correct.In eastern Europe we have two kinds of EHG. The ones that lived in the northern part were more ANE than WHG ( EHG is a mix between ANE and WHG). The ones that lived in the pontic steppe and in the westernmost part of southern Russia were more WHG shifted. The latter were the EHG that became the PIE.
There is no "Unknown" HG in Anatolia. They were Villabruna like IMHO.
EHG= WHG+ANE+LAKE BAIKAL (almost full of east asian)
WSHG= EHG+ANE+EAST ASIAN = WHG +ANE+EAST ASIAN
So the two are same people archaeologically and anthropologically.
What I was trying to post is the fact that the WSHG has steppe component.
I think this is a very important fact:
When Damgaard paper about ancient lake baikal was published, people think that the lake baikal people were mongols. Because the paper said lake baikal people was replaced by east asian.
The problem is anthro data: the lake baikal people has paleo skull like american indian, not mongoloids.
I think the same thing happened in west siberia and central asia. CWC, sintashta and andronovo have similar gene admixtures enough to think of migration from west to east. However, their skull shape pattern is opposite. Moving to east, skull shape becomes close to broad-face paleo type.
So I guess that steppe component reached west siberia/central asia before neolithic age. Actually Iran farmer has already anatolia gene around 7,000.bc.