With Pure Raw, there is no way to adjust sharpening, it appears to be built into the NR algorithms. So I'm learning to be very light-handed with sharpening in ACR/LR.
I must say, I have been impressed with the results in very high ISO images when using just Pure Raw and ACR/LR.
Doesn't the lens softness correction option have some choices? That's where the sharpening is happening.