Was it a mistake to expand The Sing-Off and give it a full, fall season?
The Sing-Off concludes its third and first full season tonight, as either the Dartmouth Aires, Pentatonix, or Urban Method will win the a cappella singing competition. But moving the show to the fall as a placeholder for The Voice may have been a mistake. Perhaps unsurprisingly, ratings are down significantly: they’ve have dropped more than …