I could be wrong on this one, but I thought as you raise the roll center, you increase the amount of roll. I agree that more roll gives more traction, but I thought it was the other way around on which gives more roll...
I can say this much. The track here in Vegas has high traction and Swauger told me he normally runs the A block here. I was at Revelation a few months ago and the traction was super duper opper high and everyone was running the A block there as well.