The turnover on the defensive staff was the biggest problem for Bill 1.0, especially when you add in the fact those were some of the best recruiters.
It is unlikely Briles loses anyone from his defensive staff and I doubt losing many offensive assistants will be much of a problem. In fact, Briles would likely replace any losses with an up and coming Texas HS coach that further adds to his recruiting base in Texas.
With Strong not embracing the Texas HS HUNH style and OU stuck in a rut it is not hard to imagine Briles on run of double digit win seasons not unlike DoD 1.0.