sosidge: by running a higher roll centre, you can afford to run less camber (like 0 or like -0.5 degrees). This means in a straight line you will have more contact patch on the ground.
While in the corners, the extra camber gain by a higher roll centre should be able to compensate for running very little camber.
The downpoint here could be an understeering car out of the apex. This may not be bad as it will allow you to lay down the power.
My 2 cents.
~Alvin