The Traction issues you describe will not be solved by suspension changes. I'd still get it done to tighten up the rear and eliminate the "squirm" as it's an uncomfortable feeling when ya arse changes lane for ya!!!
The traction issue is simply too much torque and not enough grip, I found the only thing to do was wind back the boost to 8 and 10 psi in first and second. I still get the dct light but it is right on the edge