Again I don't think that's what he's saying. I think what he's saying is on a given play it's difficult for fans or PFF etc to determine what actually went wrong.
You won't like this because Schlereth was an OL too but here's him just 2 days ago saying DJ is not dynamic anymore and hasn't been since 2016.
https://arizonasports.com/story/209...id-johnson-is-not-a-dynamic-offensive-player/
The kicker from that article is if you block for 5 yards, he'll get you 5 yards. He's just not getting as many explosive plays as he did in 16, not even close. as Schlereth said some is scheme, some is the OL, and some is Johnson just doesn't look to be the same guy.
last year I think the OL was horrible and the scheme, up the middle, was bad. DJ averaged 3.6, Edmonds 3.5. This year it's early but DJ is 3.7 and Edmonds is 4.4. Chase only has 5 carries way too small a sample size and hopefully DJ is about to break off a big run next week and start doing it more often, he has had some flashes as Schlereth says. But so far it looks to me like there's more room to run this year than last due to scheme, I just don't think DJ is very comfortable running out of this scheme, it seems Chase is far more comfortable in it than David is.
I think the OL sucks, I think we need better play from Kyler and I think Kliff needs to tweak the offense too.