Acceleration grip for autocross

At the grm challenge this past weekend, traction and such were an issue. This is primarily an autocross car, so keep in mind the ecs button is now always getting the long hold.
Currently shod in kumho v730s

I have an off the shelf cobb accessport. I noticed it has traction control settings to add its own. I also noticed it only has stage 1 and two tunes available in it for some reason (wheres the stage 3??).

Ultimately i KNOW an actual limited slip is the correct answer, but those are $800 plus install from whoosh. As the challenge is a budget limited event, and i hope to return and finish higher than 10th overall, i want to explore other options.

What does the cobb traction control do? How well does it work? Is there a cheaper than 800 option that works better?
Wheres my stage 3 tune for when i CAN lay down power?

The Cobb TC just retards timing instead of also reducing boost and throttle. So it’s a much more limited intervention, and you can still definitely spin the tires - it just gives you a little more wiggle room on your fine throttle control. The effect is barely noticable but it does help slightly to avoid breaking traction, but more importantly it makes it easier to regain it without totally lifting on the throttle, since it’s keyed off “slip” and wheelspin. The baseline where it kicks in is actually somewhat high (supposedly 20% slip vs the stock TC activating at 8%) where slip is wheel speed difference F/R

Most AP tunes can be set to give it to you at a chosen setting by default - even at its most aggressive setting, it’s very subtle unless you’re really paying attention.

In second gear from a dig I can sometimes break it loose by stabbing the pedal to the floor but third gear in a straight line is pretty solid even with a ham-fisted throttle on a stage 2 tune.

On the track, even third gear coming out of a low speed corner, I can still break the inside front tire loose and traction management is still tricky. It’s enough that I never really get wheel spin coming out of hard 4th gear sweepers on 200TW tires.