Since 8.0, I have noticed that Autopilot has become extremely reticent to make a lane change. My success rate is down to about 25%. It has become polite beyond recognition. I might not be patient enough, as after 5-10 seconds of waiting with the blinker on, I just take over and do it myself. This was definitely not the case in previous software iterations of the system. Same roads, same driver, same lane markings.