By Liana B. Baker and Lisa Richwine (Reuters) – NBC's "Today" is revamping its show as it tries to retake the ratings lead it held for decades, adding "The Voice" host Carson Daly and a new set to lure back viewers who defected last year to ABC's "Good Morning America." "Today," which generates the bulk of the profits for NBC's news division, is looking to recapture viewers it lost after anchor Ann Curry left in June 2012. Earlier that spring, "Good Morning America" snapped the show's 16-year winning streak atop the morning ratings. …