Volga Steppe Khvalynsk culture (Copper Age) from 5200-4000 BC, R1a and R1b together!

[Ukko]

Moreover, now that the most ancient N1c is still N1c found in Smolensk 2500 BC which is probably ancestral to all Finnish N1c and precedes all Finnic protolanguages you posted, there is really not any Iron Age genetic yDNA path from Volga to Finland and neither in terms of mtDNA. The situation is tricky.

Ancient yDNA and autosomal anaysis from Volga is desperately needed in order to clarify the situation.

N1c is clearly the language carrier via elite dominance, its influence stopped or was reversed in the Baltic and Scandinavia.

You almost sound like you think Corded Ware was Uralic, you need to let go of that.

http://www.kolumbus.fi/geodun/YDNA/SNP-N-TREE-FIN.jpg