I'd say it probably switched (from being even to a Utah advantage) around 2014, though that's slightly obscured by a relatively even 2016 (and grew larger after that). Which makes sense since 2014 or so is when Utah was really able to bring all their P5 advantages to bear.

That makes me think it's less to do with Kalani replacing Bronco and more to do with Utah having P5 advantages. But that also gives more hope since we now have those same advantages.