It's just like I said....Mullen says teams are spying Dak and giving us a pass friendly look. Naturally, Shump is going to be in more bc of his good hands in catching the ball, but more importantly his pass blocking. It's hard for a true freshman to be a good pass blocker. Show me some around the SEC not named Nick Chubb or Leonard Fournette who were really good as true freshman. There's a few, but not many and you'll most likely name people who rushed for a lot of yards, but won't watch their film to see how good they were at picking up the blitz.
When teams start giving us different looks that favor the running game, I think you'll see more of Williams, Lee and Holloway getting carries.