When I saw Miles it was right after he had made drastic changes, not only in his music, but in his personal life as well. Betty Mabry, who was more or less "a hippy", was a big influence in his personal life and his music; hence Miles in a fringed raw hide vest.
This was in Chicago, but fortunately I was at that set with a guy from New York (New Yorker's are always hip to everything). He explained that this was Miles new music, but that didn't make it any easier on my ears; of course that would not have mattered to Miles, he knew what he was doing; this was the music of "Bitches Brew" before it was recorded.
That's what happens when you pour wine from a bottle of whiskey. If you taste wine when you expect whiskey, you spit it out. If you taste whiskey when you expect wine, you spit it out. I expected to see the Miles I had come to know and love, not some hippy playing this very different music.
Enjoy the music.