NWS sensitivity varies with pedal set
The ground handling of the F16 is still not OK. It seems to vary with pedal set though.
I started flying the F16 on a TM16000/Throttle/Pedals set. Here the 12/24 release is still a handful. It varies with base, the Vaziani Cold and dark takeoff is tricky even with a Y 45 and Curve at 30! It leaves a too sensitive NWS and too low authority rudder when decoupling the NWS (just did a run to check with reduced Y, otherwise I run Curve 30 only). Then on other bases with std setting except for Curve 30, it's more OK.
This is on my office Envy 34 with i7-8700T and GTX8500. It's not a computer problem, the CPU and graphics are just fine with single-player and graphics at high (the screen is fantastic for DCS BTW).
Then I've built a separate sim rig as DCS is really close to the real thing and it gives me real satisfaction flying fighters again (great job ED). Here I have i7-8700, 32GB, RTX2080, WH HOTAS and CH Pro pedals. And now the aircraft behaves differently! it's less of a handful on the ground despite using normal Y (100) and Curve 30.
Both pedal sets are calibrated and the CH one has cruder 8-bit decoding versus a 10 bit for the TFRP pedals. But they are easier to fly with. Strange.
Other nits: The base engine is too weak at altitude and the auto-trim is too weak (I haven't flown the F16 though but other FBW aircraft with auto-trim), the pitch channel is too insensitive with a displacement stick around zero (will try a negative curve but as 99% has displacements sticks you ought to handle it in the applicaton) but you should know all this.
I've been part of developing fighters and I think your NWS problem is to high grip level on the nose wheel. It's significantly smaller than the main wheels and has less weight on it, hence significantly less grip and more tire deformation and slip. The main LG on the F16 is a swing axle design (like the Beetle) and has a narrow track. So it's not great (camber and track change when suspending) but I can't believe it's this bad in its grip level vs the nose wheel. We have 4k F16 in the field and very few ground roll accidents. The real F16 should be OK to handle for the least proficient pilots.
It could also be the real F16 has NWS gain scheduling or/and a weak link NWS and you implement with no schedule and/or a stiff link NWS.