The 2021 Pittsburgh Steelers skill position players lacked game changing speed, especially by current NFL standards. The majority were quicker than fast.
However, this glaring shortcoming was by no means responsible for what became a mind-numbingly predictable and extremely limited offensive attack, with offensive being the most accurate description. It actually caused physical pain for many Steelers fans to watch the Steelers offense, particularly the first three quarters of each contest.
Steelers legend Ben Roethlisberger was damaged goods going into the season, especially his knees, and it went down hill from there. He needed a strong running game, and a clean pocket, with time to survey the field.