No I think Russia is really afraid that these new weapons are going to make a difference in Ukraine's offensive capability. If Ukraine is able to hold off Russia keeping them near the Russian border with MRAPS, HUMMERS, M113's, 20 HiMARS and other outdated NATO weapons, then this new weapons package that will likely be ready by Spring is meant to push out Russian forces.to prevent NATO sending troops into Ukraine?
This is going to drastically change Ukraine's offensive capabilities and Russia knows this which is why Dmitry is threatening nukes. The thing is Russia has been communicated that any nuke used inside Ukraine the US would respond with the destruction of all Russian forces in Ukraine and Black sea by conventional means.
Basically this war is going to escalate which doesn't surprise me since I have always thought that this war was eventually going to become a much bigger war involving some NATO countries and US. US is sending so much of their tanks, ifv's and other armored vehicles to Poland it's like they know this war is going to get bigger.
It just frigging sucks!