Remember record albums? If you put a 45 on 33 it would sound like Casey just did. People are not created to sing slow like Aaron and Casey have. Now if one of them picks up the tempo, IMO, the show picked that person to do better than the rest. Believe me, this show knows how to make people sound worse, not better. I won't be watching next year if the coaches don't do a better job, not the mentors, the other vocal coaches know the tricks of the trade and they aren't sharing them w/the contestants. Watch one sing faster. That person was SELECTED to get a perfect tempo and they will float along which is what Frank music is supposed to do.
They sabotaged Aaron and Casey.