When you talk about coaches mis-using a player, it's usually about them not playing him enough, failing to work a scheme around him, or playing him out of position.
But Frost pretty much built his entire offense around Wan'dale, getting the ball to his best weapon as much as possible. Wan'dale should never have been the major ball carrier out out of the backfield, but it made tons of sense to use him as a change-of-pace RB, like we used to use our wingbacks.
Wan'dale delivered everything asked of him and more at UNL, but it left him looking at a career on a losing team and potential decapitation when those throws across the middle were too high. I don't think Wan'dale was really mis-used, but he made the right choice anyway.
I can't get too upset about Greg Bell, either. Nice enough season at SDSU, but if Nebraska handed the ball to a running back 250 times a season, we'd have a 1,000 yard running back, too. I think every RB we had during and after Greg Bell has averaged 4.5 yards a carry. So it's not a personnel issue. Noah Vedral reminds us that Adrian Martinez was a significantly better quarterback, but Noah got two more wins and a bowl game because life is funny.