100% lifting off the brakes would have helped.
A few reasons and I don't know if they directly contribute to the issue you experienced are:
- LSDs take time to work, especially in front wheel drive cars and the camber change doesn't help.
- rear brake bias does help flatten braking profile but at the cost of ultimate braking force (it's why the big discs and pistons are up front)
- I personally think actually running a slightly forward brake bias is better for gentle high speed turns and the type of hair pins here as you are largely trying to tuck the front end in, which dragging the back doesn't do. And they are very much mostly partial pressure zones that stay in the FWD envelope and if you brake early and get the turn in won't suffer from the understeer.
I genuinely believe the single most thing that has made me faster is coming off the brakes earlier. Even in those dive bomb situations brake hard come off them and turn runs me wide yes but still on the alternative line or still in the race.
What I do for the corkscrew is 2 braking zones the one at the marker, hard straight line but fractionally lift at the crest to let the car fall closer to the road and then squeeze hard again until I'm at roughly 55mph to cut the first apex.
I think I learned from last week the key to controlling the Mazdas diff is to drive round the road surface changes
Edit: abs will have a problem if your front wheels go airborne as it doesn't know the landing speed so the lock up will happen much quicker vs full contact lock up. Similar to planes landing gear puffing smoke because of the rotational differential your caliper would have stopped the wheel rotating.
This is all maybe what if stuff though. Or conjecture to be proper