The NFL’s TV ratings dive continues to show no signs of letting up. Regional ratings for Fox’s NFC package have shown the smallest drop at just 1 percent through seven weeks compared to 2015, while regional ratings for CBS’ AFC package are down 9 percent, FOX Sports executive vice president of research Michael Mulvihill tweeted Tuesday. Although the ratings for “Monday Night Football” have fallen off a cliff compared to last season, ratings for “Thursday Night Football” on CBS and the NFL Network and for NBC’s “Sunday Night Football” aren’t much better. ...