The conclusion we made from the giant debate in the other thread is that lowering can help if done right, but if you lower too much, it will worsen it. However, I will not ignore the fact spring rates are matched to shocks. So to have an ideal setup, a coilover set is a must IMO. The biggest and hardest problem is the change of the geometry that happens when you lower. Imagine a big tall upside down V. When you lower the car, the V spreads out more. Ideally, you want the legs to be shorter... but it doesn't work that way.
"We live for a good time, not a long time."
RIP Colin McRae