Here is a picture of me going through a 70 mph sweeper at Pacific Raceways, not the kind of turn you are likely to encounter at an autocross. Notice how much the car is leaning - maybe even more than your car in the picture you posted.
The car is really well balanced, so whatever lean there is doesn't really matter.
That said, I did put slightly stiffer sway bars on last week. They are ROW M030 sways, so they are a matched set. The reason I'm going with those is because I'm going to be using track tires now, and the loading will be a bit more than with the street tires, meaning it will lean even more. I don't want to chew up the edges of the tires, so hello stiffer sways.