There are a lot of offensive symptoms, but this is the disease. Inability to run between the tackles. Once the gears start to turn with them being able to run inside zone effectively, it's going to look like a night and day different offense.
To add to the problem, Adrian has made some poor choices and meshes on outside zone-read action. There are at least a couple plays where he hasn't forced the read man to commit and it's been a total dud. One appeared to be in overtime.
I'm not a Taylor Martinez fan per se, but his freshman year he was deadly on his zone-read mesh. He fooled me and the camera guy tons of times along with the defense and it was killer. Adrian has to be more patient at the mesh point, and I think lack of practice time with Mo and Mills both contributes to that.