Well his point would be better if a) Patterson was the 13th leading returning passer in the SEC, which he isn't, he's 10th or B) if you want to go by quarterback rating which to me is a better metric for QBs, he'd be 8th.
You can make a case for Patterson being the 7-8th best QB in the SEC based off an eye test. If you ranked the QB's Hurts, Fitz, Allen, Stidham, Bentley, Eason, Patterson, I would have no problem with that. The problem at running back is I can make the exact same case for Williams being that low. He's not noticeably better than Guice, Chubb, Michel, Pettway, Travyeon Williams, Damien Harris, Scarborough, Scarlett, either of the two Mizzou backs, or Snell. That would be 12th, and then when you factor in the lack of depth, its easy to see why were that low.
We are all projecting Williams to have a big year, which I think he will, but the SEC is loaded with great running backs, Williams would have to break records to stand out in that group.