When Tua took the reins at QB, philosophically, I believe we saw the transition from one to the other: pass to set up the run. That continued through Bryce. In a sense this is what I was alluding to earlier.
Getting off track for a second, one of the best attributes we see with the offense ran by Lincoln Riley is how he schemes his wide receivers open. His QB's get the credit most of the time; the scheme is set aside.
When Marrone was coaching the offensive line I came to the conclusion he was asking his unit to execute blocking schemes that would be "old hat" for an NFL lineman, but a struggle for collegiate guys. With O'Brien, I see the same thing except here it's what I mentioned earlier. His game plan for Bryce was an NFL type approach (throwing guys open instead of scheming guys open.)
They both work. But I see a flaw in the approach that's not on the QB but more on the receivers. A guy jumping from high school ball to college ball...it's going to take some time, and a lot of reps, for them to get accustomed to being thrown open versus just getting open.
Based on what I've learned as well as what we've seen with Coach Wolf recruiting a different type of lineman, it looks like they'll return to more of a "run to set up the pass" approach.
And I firmly believe Ty has the tools to "throw a guy open" if they continued this approach.