Is this for some reason personal with you, a grudge match going back not 2,000 years to the Romans vs Celts this time, but 5,000 years to the farmers versus the steppe people? It's a question of sides, and you've taken the side of your Yamnaya ancestors versus your farmer ancestors?
The studies and evidence of which I'm aware, including David Anthony, indicate that farming was a minor part of the culture of the steppe peoples, present initially only in some isolated river valleys west of the Don. In fact, that's one of the "clouds" on the entire "Indo-European" from the Pontic steppe theory, as James Mallory pointed out. (Coincidentally, he's a contributing author to this study.) What they knew of it they learned
from farming people. That's also how they got their domesticated animals and learned how to herd them.
http://jolr.ru/files/(112)jlr2013-9(145-154).pdf
As for plows, they were already in use in European Neolithic farming cultures in Passy around Paris at least by 4500 BC, pulled by oxen, and, some scholars have speculated, perhaps even by horses.
http://archive.archaeology.org/online/features/neolithic/
We discussed it here:
http://archive.archaeology.org/online/features/neolithic
See also:
http://www.academia.edu/12994132/Di...Intensification_of_Metallurgy_in_Central_Euro
So, if farmers all over Europe had ploughs and draft animals long before Yamnaya or Corded Ware, then how precisely could the IEs possession of them have been an advantage the IEs had over people who had them first? I don't mean to be provocative, but I don't understand that.
As for wheels, this is still pretty much the consensus view among archaeologists so far as I know:
"Evidence of wheeled vehicles appears from the second half of the
4th millennium BC, near-simultaneously in
Mesopotamia (Sumerian civilization), the Northern
Caucasus (
Maykop culture) and
Central Europe, so that the question of which culture originally invented the wheeled vehicle is still unsolved."
I don't see steppe groups mentioned anywhere there. I know a lot of peope are R1b aficionados, so if Maykop turns out to be R1b, although perhaps heavily CHG, you guys will be able to claim it, along perhaps with Bronze.
https://en.wikipedia.org/wiki/Wheel
Wheeled carts, so far as I remember, first appeared in the TRB culture.
As to this matter of the dairy cows and how much milk they produced, that's very interesting. Could you point me to the papers you're using for the fact that the cows on the steppe produced more milk than the ones in Vinca or CT? I'd love to see that.
I'm really not going to bother sourcing material about violence among Neolithic groups vs violence among steppe groups. I'm sure we've all been there, read that. All human groups were violent if resources were scarce. The steppe people were no slouches in this regard, or are you not one of the "we he men killed all the inferior haplogroup men and impregnated all their women brigrade?" Regardless, from their remains the newcomers were pretty battle scarred by the time they got to the rest of Europe.