Although i'm still not fully clear on the NUMA nodes. I assume as i have a 6 core processor (x2) with hyperthreading that if the vCPUs i require per VM is 6 or less then wide and flat is not entirely necessary but its a safe rule to apply.
As long as
a) Your largest VM by vCPU count fits into a single NUMA-Node (physical core count)
OR
b) You're not exceeding 8 (read: at least 9) vCPUs for a single VM
Then there is no point in worrying about (v)NUMA scheduling.
So the license that is applied to the host by CPU sockets is only relevant to the host and doesn't affect the amount of vCPUs i can apply to the VMs, this is only affected by what is supported by that OS.
Yes, in the case of Windows, it's a hard socket limit per installed server edition. Besides the OS has no way of knowing what license you assign logically to physical host's CPUs.