Forgive me for exposing my ignorance:
Isn't heel & Toe down-shifting/Braking intended for those who want to be smooth at relatively high speeds ?
I have always thought that with a FWD or AWD car, you can approach a tight corner flat-out, pitch the car sideways on entry into the corner (usually with the handbrake), and then just before you hit the apex, gently roll back on the throttle ?
In snow or on dirt, that has always worked best for me. I have never really tried "hero driving" techniques above say 45 mph, though.
I must admit I haven't ever taken the time to learn heal-toe driving...