Foxy made one coaching call last year which cost the Broncos a playoff win. Bet Elway is not going to let that happen again. The Broncos are Elway and Peyton's team. Foxy is just a place holder.
He's done made calls against Manning so far in these playoffs, heck the GL situation where Denver kicked a FG was all Fox. Manning wanted to go for it and Fox vetoed it. He's a lot more then a place holder, he's one of the best defensive minds in football.
Fox didn't want to stay here anyway after the fallout between him and JR. So his last few seasons here are a moot point, he wanted out. The fact that those years he was held back by poor decisions on JR and Hurney has nothing to do with him being a bad or good coach.