I have a 60 and have noticed my peak of rated miles at the formerly standard charge (I'm now on 4.5) went from consistently 189-90 down to 185-86 in the past month. I received 4.5 two days ago.
After reading this thread, last night I dialed down my amps on my 14-50 to 30. Just after completing charging this morning at what I assume is 90%, I only got 183 miles. I did do a lot of high speed charging this past weekend with a couple stops at the Gilroy SC and a number of other 70A stations along 101. I guess I can try to slow charge using a 110 next time for a day to see if that makes any difference. Hoping this isn't the new normal.