Join Date: Apr 2019
Location: Middle OH, USA, Earth
ACC does seem to have the characteristics described of slowing down when the vehicle ahead changes lanes. It realizes that vehicle ahead *is* slowing down as it is changing lane (e.g. exit ramp or it is getting behind a slower moving vehicle in the other lane) and not fully out of the lane ahead of you. You can use the feature of decreasing the follow mode gap to relieve it a bit but it won't eliminate it.
I have let the ACC bring the car to a stop. It is a bit slow at getting the car moving again though. One does have to press the go pedal slightly to get ACC to start moving the car. However, this is a gradual acceleration that you'll find quite slow and annoying to anyone behind you, unless you're in a slow moving traffic situation. You can fix this with more use of foot on pedal until an appropriate speed is reached to allow ACC to take over.