Moose was the obvious sacrificial singer. Part of me wonders if his platform was for health reasons and part was for "Norm!". After the reveal, he didn't seem all that good to me to be honest, so I wonder if a bug was going through the singers when they were filming. They kept suggesting John Goodman as a good guess and it had me shaking my head; John can sing; he's a blues brother for crying out loud; there's no way even faking it he would have done Power that badly.
Scorpio vs Doll was good. I don't know if it's the costume or something else but Doll's singing seems more muffled than usual, but in the end I agree that he should go forward.
As for who Scorpio was, I've seen the show once or twice, but not enough to recognize the people on it, so I had no idea who she was. She was a decent enough singer for a non professional, and she certainly owned the stage. Really both her and Doll did well, but no way was Scorpio worth the bell. I suspect the bell will be run next episode since it's been run on the 3rd and 1st of the groups so far.
