By Shawn Childs Change at QB could hurt Johnson’s production. Last season, Steelers wide receiver Diontae Johnson developed into a high-volume pass-catcher, leading to him ranking tied for second in wide receiver targets (169) and fifth in catches (107). However, his lower yards per catch (10.9) led to a lower finish in receiving yards (1,161). Johnson had 15 drops in 2020, hurting his catch rate (61.1). Last year he improved his catch rate to 63.3, helped by only seven drops. Johnson had a floor of seven catches in nine starts, but he gained over 100 yards in only three games (9/105, 7/101/1,…