I had a call from a Kawasaki quality engineer. He was actually calling about my broken top case bracket which was replaced under warranty. After that conversation I asked him about the rotor problem. He said they are actively working on it, but don't have a definitive solution yet.
Meanwhile, mine pulse moderately, but not enough for me to give my bike up for two weeks. I'm ready for new front brake pads, so I'll try cleaning the rotors and see what happens with the new pads.