Yeah I wasn't super impressed on day 1 of using 2018.6.1, but now that I've got 200 miles and counting on it, without a doubt for me in California it's the best AP release yet for HW2.0. It's choosing the correct lane line to trust when one disappears, and following sharper curves correctly, and decelerating more smoothly. It seems to be willing to turn the steering wheel sharper at lower speeds too, it's able to navigate through a school zone at 25mph that requires turning the steering wheel nearly 90 degrees.
Not sure if they are using more cameras or if they're improving mapping (or the use of the mapping data), but there's definitely an improvement. Basically zero change to car / lane recognition though, I suspect the neural net hasn't changed yet.