TheStreet: The decision by NBC on whether to bring back suspended “Nightly News” anchor Brian Williams could have huge implications for the network’s battered news division, according to industry insiders who say restoring credibility is an essential first step to improving its ratings. “Lester Holt has earned the right to keep the NBC job,” according to former NBC entertainment chief Garth Ancier. For the season just ended, the evening-news broadcast from ABC averaged 2.113 million viewers for adults aged 25-54, narrowly defeating the NBC show, which averaged 2.112 million viewers.