Coaches let this play out for another week or at least a few more practices before making the decision. One scrimmage should not be the deciding factor.
They cannot rush this decision, you have to be ready right out of chute, there are no cupcakes or give me games to break your starter in. If they are going to go with the true freshman, they better make absolutely sure that he is ready and is the right guy and gives them the best chance to win, otherwise it could completely backfire on them.