I had solved the majority of my traction control issues. The biggest difference that was almost always overlooked, was alignment settings. This easily fixed the majority of my traction control issues off the bat, and the car handled much better.
try:
-DNA adjustable control arms in addition to other adjustable suspension parts. Measure your suspension parts and calculate the new alignment settings.
-Wide, sticky summer tires. I used to have a separate set of rims that I swapped to when it got cold or rainy. Had to significantly roll to the fenders in order to get the larger tire to fit.
-High end, corner balanced coilovers with stiff enough spring rates w/ compression and rebound adjusted properly
-Properly setup clutch-type LSD
-Tune adjustments, reduce the torque peak in low rpms, or limit boost in certain gears (1-2)
-Stiffer engine mounts and RMM
I have the 6pt brace but installed it alongside many other mods at the same time, so I'm not sure what difference it had. Subframe stiffness/control arm mount bracing is beneficial in almost all cases, so I see few downsides. If the chassis is too flexible, because of our MacPhearson strut design the alignment can change while under hard cornering or accelerating.