I really don't understand how 1 games worth of good run defense gives them that much credibility. Also, abandoning the run completely would be moronic. Regardless of whether it's working good or not, you have to run the ball to some extent for the sake of keeping the defense honest. Even with the passing game you sometimes have to run a low percentage play to keep the secondary from cheating routes you're having success with, fans never like it but it's part of game planning and play calling.