Following h0tp0t's great post with his service writeup, I went to my dealer and showed him the SIB. The foreman had no idea and initially said that there was no fix from BMW. He agreed to have the tech look into it and they ended up doing the firmware update and now it's fixed.
As I am the OP of this thread from back in 2017, I have a new video of how my car sounds now both inside and outside after i ran down to below 1/8 tank of fuel exactly as my original video from back in 2017.