I specifically watched on passing plays to see how many routes where over the middle - it was very rareSee above. I said I don't watch the All-22 so I don't know. But Occam's Razor suggests that it's likely more a QB thing than an OC thing. I mean, it's almost impossible to even draw up 100+ plays with fewer than 10 of them having anyone in the middle of the field.
That’s a scheme problem