400units, I think I have gotten to your third point on my SC10. It is too eager to over-rotate and I have a hard time putting down power coming out of the corners too. I also have a hard time with traction rolling in our sweeper. My thought is to start looking at sway bars in the front. I've already got the front roll stiffness as firm as I can get it with the camber link (yes, I got the direction right this time

). I think we could start to expand the discussion out to things just beyond camber links (sway bars, diff adjustments- both ball diff and gear diff, anti-squat, kick-up, etc.).
I've had good luck with the spring balancing in the past but I have not forced myself to stick to it exclusively. I will move the shocks around on their mounting positions a bit. There's too much benefit in handling from moving the shocks to not take advantage of it.