Yea I couldnt believe they didnt have some built in redudancy for a live show. Even with a failed mic, I thought there performance was better than all the others combined including winners. Gaga and Metallica went together like a reeses cup.
The Grammys always snub hard rock and metal artists, that's simply a known fact. They only want to make as much money as they can and don't care about recognizing great artists. Metallica wasn't even given an introduction and put on later around 10 Eastern standard time because metal is not as accessible as pop, hip hop or country music. I love hard rock and metal, but it apparently doesn't sell well on television. That's why they added in Lady Gaga to try to get higher ratings.