The manufacturers aren't as stupid as putting non linear ffb motors into their bases... At least for me, driving in ac on the circle pit of the track "skidpad" felt very linear with all wheels (dfgt, g27, t300, ts-pc and csw 2.5), while using what wheelcheck created always felt super weird...
My LUTs are only a smoother minimum force slider.
I'd say if you're using/needing more than 3% minimum force to get a tight ffb around the center, then a LUT is useful as the notch from the too cut off minimum force becomes feelable.
I had a few mins to just test out a few things but time slipped away !
This is what I last set my TX to (which I think is similar to the T300):