Write him off? Nah... might as well role with him. But I don’t think he is going to magically make this team a winner. I also don’t think he is the future.
As for JG in practice, honestly I’m not sure what you expect a coach to do there. Part of practice is for coaches to evaluate their players. Generally speaking the guys that practice best, play best. Very very few exceptions to that. By all accounts not only did JG practice well but BM did not by a substantial margin.
I think Pruitt is in over his head in general but I’m not going to fault him for playing the guys that practice better than the guys behind them.