would have to go back and look at the situations before to know if he abandoned the run early. You look at one aspect compared to the whole game, its easy to make your point. 15 runs is not very many for your top RB.
I don't think he abandoned the run, but if he stuck with it more, then it might have opened things up for the pass.
Either way, Hall played horrible and lost that game for BYU. BYU had 2 punts and 6 turnovers.