CB play is the hardest to assess from TV broadcast footage. Figuring out a player’s true assignment, and assessing how well he carries it out, takes a lot more education and intuition when it comes to DB play than line play. That having been said, I think this chart matches up well with our armchair understanding of the Lions’ CB situation:
Zac Snyder got hooked on the Lions after his dad took him to a Monday Night Football game against the Los Angeles Raiders in 1990. The show put on by Barry Sanders and Bo Jackson that night was only surpassed by what Zac could do with Barry in a game of Tecmo Super Bowl.