Actually you want it to roll more. To do so you will need to increase droop and lower you're roll center.
When you're car traction rolls, its because there are forces pushing on the car to rotate on its outside wheel as it turns. If the car doesn't roll and the forces are great, the car will pivot on the outside tire lifting the inside tire. The inside tire lifts because there's not enough droop to maintain contact with the surface. Hence the need to add droop. To prevent the forces from pushing hard enough to pivot your car on the outside wheel, you need to make the car roll more. The rolling action sucks up that force which would otherwise pivot your car at the wheel if it didn't roll.