Marcel, of late, did make some poor decisions; ignoring the hole he was given and trying to bounce outside with too little speed and quickness.
But it's not as though he would have picked up a gazillion yards had he lowered his shoulder and cut into the hole either. But he would have picked up 2 or 3 yards instead of losing 3 or 4.
The offensive line isn't blocking. The RB's (both Shipp and JJ) aren't running. No doubt the negative things from the backs and O-linemen feed off one another. It's infectious - The backs don't trust their blockers, and the blockers don't feel it's worthwhile to give extra effort if the RB isn't going to take advantage of it.
Nothing succeeds like success. You gotta hope that sometime, somehow we're going to get lucky. A couple of holes will open up and our backs will begin to establish some of that so-called rhythm. So far this hasn't happened. I think it will have to if we're ever going to get our running game on track during the remainder of the season.