'Today' Seeks Yesterday's Glory By ALESSANDRA STANLEY Something has to be very wrong with NBC's "Today" if viewers are turning to ABC's Diane Sawyer as a refreshingly wholesome, down-to-earth alternative. For more than a decade Katie Couric has reigned as the Everywoman of morning television. NBC considered her so critical to restoring the pre-eminence of "Today" after the disaster known as Deborah Norville that in 2001 the network gave her a $60 million contract over four-and-a-half years to keep her from defecting. Inevitably, Ms. Couric's on-air persona changed, along with her appearance and pay scale. But lately her image has...