There are so many things to do.

A softer rear sway bar is an easy change. If you don't have one just tighten up the front one a few mm.
Softer rear end suspension is another thing to test.
Lower the rear ride height slightly.
Rear camber link in a lower position.
Lighter diff oil in the rear.

Changing the rear toe to 2 deg from 3deg makes the car more predictive in handling. It doesn't loose grip suddenly but more gradual. It can make it feel easier to drive on the edge.