I went through the gamut of disabling things, including hydraulic brake assistant, turning down brake booster, starting vibration reduction, and on and on for all the standard stuff everyone does. After 3.5 years of track work, I turned back on almost everything except for straight ahead brake stabilization and vaq to increased traction.
Hydraulic Brake assistant in particular adds pressure when you're stopped and as you shift down. Starting vibration reduction smoothes the harshness on takeoff (extremely apparent with a new dogbone bushing).
When I do track this car now (I have a replacement toy and this is again my daily), I turn down the brake booster to 1, but that's only because I swap to track pads that are not at all compressible. I used to boil every kind of fluid I tried, Castrol srf, rbf660, among others. With my current settings and running rbf600 I can go a full weekend without boiling fluid. Ymmv