Would the step between active diff and none at all be something like a Torsen or a viscous coupling then? i.e. not interfered with electronically (not in the same way a Haldex works, that would be a REactive wait-until-you're-already-understeering system), purely a mechanically PROactive system?
AFAIK there is no electronics currently.
"With that car, your brain can actually never keep up"
https://www.youtube.com/watch?v=_4IRMYuE1hI
But surprisingly start the rally with new codriver and repaired car.
News from France