I think even the blipping in LFS is annoying and in a way "too hard" because it's so easy to lock wheels and then make a instant spin because of the low speed grip probs.
I think my choice in NK will be that "semi-auto" (only auto-clutched shifts), I don't find any point using a button clutch because I don't have clutch pedal. I think using a button clutch (talking only about shifting, starts are a different thing of course) is more unrealistic than playing without a clutch at all.