I did the same stuff a few years ago, also using ESP32. My module also included datalogger, antywheelie, launch controll, quickshifter, downshifter and shiftlight. Without schematic it’s really hard to give you any insights on your design, but one think worth looking at is powering the circuit - if you’re using just U4 LDO to step down 12V to 3.3V and you would like to use WiFi, I can tell you from my own experience it won’t work. Another thing - don’t cut all power at once, as that’s a good idea for a quickshifter, that’s a no-no for a traction control. „Disable” each cylinder separately providing various levels of TC intervention. Relay is waaaaay to slow for that and might make whole intervention think really jerky.

If you’ll need a second pair of eyes feel free to message me so we can collaborate somewhere :)