It might "help" some - a reverse stagger - perhaps a bit. I've taken a similar approach on other cars but using different compound tires. Major eye opener. Put a pair of sticky tires on the front and find a wide open space...

Another way to help get a more neutral balance with a square setup would be to use a stock front swaybar with a big rear bar. For those with double adjustable shocks, stiffening the rear compression would add to the effect. Essentially a softer front end with less roll-stiffness compared to the rear will help increase oversteer.

With a FWD car the only true option is a torque sensing differential like Quaife. Made a drastic improvement on my VW. So much that it ended up being almost too tail happy. If given a choice would do the front RS6 diff first, then address the rear as needed.

Was always curious what Randy Pobst did on their race RS6's. Obviously worked.

BTW he's in my RS6 Facebook group, which is super cool.