Nielsen has for years been the subject of criticism from some of its flagship TV clients. One way to address the squabbling? Hire more TV executives. Julie DeTraglia, a veteran research executive, has joined Nielsen as head of content and strategic insights, and will oversee strategy behind editorial marketing content for the media-measurement giant, supervising  social media, insights articles, client communications, events, sales enablement tools and podcasts.  DeTraglia will be based in Nielsen’s New York headquarters and report to Sacha Weinberg, head of global marketing for Nielsen. Popular on Variety “Julie has a rare talent for transforming data into clear, actionable strategy. She doesn’t just look at where the market has been — she identifies the signals that tell us where it’s going next,” said Weinberg, in a statement.…