Some quick observations having taken a couple of short trips with .168:
The first only happened once, on the "outbound" leg, but not on the other end, so I have no idea what to make of this, but I'll explain, and continue to monitor it. In the past, if I had charged the car to say, 90% with range mode off, and it showed a charge of, say, 227 range miles, when I turned range mode on, just before starting a trip that I was also going to be tracking mileage for, the remaining range would change to 229 just after I turned range mode on. (I think it changed when I left that menu selection.) I noticed today that it did not change. Now I had also supercharged for the first time, so I can't say what the behavior would have been like before immediately after supercharging. But this time, with .168, when I made the switch from range mode off to range mode on, the remaining range did not increase by the expected two miles (or by anything.) I noticed as I started driving that it did seem that the rated range did not decrease for some time, so that may be where the increase was accounted for, but that makes measuring range used a bit difficult. I expected to see the same behavior when I reached the end of my trip and switched range mode off, meaning that unlike before .168, when the remaining range would have immediately decreased by a couple of miles, it would not. However that's NOT what I saw. The behavior when turning range mode off was exactly as before: my remaining rated range decreased by two miles.
Take the above for what it's worth. I realize most of you probably don't care about this.
Another thing I paid attention to was audio volume when opening and closing the door. I can't tell a difference from the behavior now, and the behavior I believe I've always had. With the audio playing if I open the door it continues playing, but at a lower volume. When I close the door the volume increases to where it was. If this is different from what was happening in .136 and .153 and other versions then it may well be "fixed." I went straight from .124 to .168. If it was also "broken" in .124, I guess I must not have noticed it. If I've misunderstood what people see as the problem, feel free to disregard this part too.
I can't say anything about acceleration in insane mode because my wife was in the car and she gets motion sick if I drive in any way other than the proverbial little old lady who only drives on Sundays. I can say that one concern I had was that the go pedal would be so much more sensitive that the car would be a little tougher to drive efficiently in Insane mode, and I did not notice that at all. I expect the increased power is probably there if we ask for it, but it does not seem to be an issue if we don't. So that's good.