I suspect the oversteer was a result of lifting off the throttle...When the back end starts to rotate with FWD, standing on the gas a bit will straighten you out, pointing in the correct direction (if you are good). 'course, you need to factor this into your plan when you chose your curve entry speed...getting on the gas at 100 MPH in a turn is a bit harry if you are wanting to scrub speed...
RWD cars understeer with throttle closed..which is more comforting in general. But the really good FWD car drivers use the rotation induced by lifing throttle to point the car around the turn...so it can be a good thing.
Stock SVT is mild-mod understeer under "typical" driving conditions. With more tire pressure front, stiffer rear bar, less rear weight can move the balance toward light understeer with easier oversteer.
