I took a long drive these 2 days. The dynamic radar cruise control seems to have improved. I guess Lexus must have done a firmware update when I brought my car in for its first service. My car used to accelerate / decelerate suddenly when another vehicle moved into or out of my lane, but now it happens gently and more closely mimics actual driving. Also, the bouncing from side to side (with Lane Keep Assist) is greatly reduced.