I think the problem with the run game is more a O-line than Trestman problem. Although, once Flacco started throwing the rock around more it did open up the run game some.
The problem with the run game is Forsett. Go with West, Allen and Dixon. JF is making WAY too much money for his production and age. Save some $$, and let the guy go get all the social media face time he needs for himself and his family!
The problem with our run game is a combination of play design and execution. Often our players are not moving the defense off the ball or the defense is reaching the hole before the blocks are made on pulls.