With the TCAs going down towards the knuckles the camber gain through the suspension travel is better. So the outer wheel will gain more negative camber and the inner wheel will loose more camber, which puts them more straight up, giving more front end grip.

On the other hand the less body roll caused by the front suspension will give the rear more grip, basically the same as fitting a stiffer arb to the front. So in theory getting the front roll centre back where it used to be should give more front and more rear end grip.