I think Mac is better than he showed last week, but I don't think the offensive uncertainty will do him any favors this season.
Also they need to use Bourne. He had roughly 900 all purpose yards last year and a HUGE amount of those were YAC. I don't think that is a solution to everything, but you don't just exclude that type of talent unless they are causing a huge distraction to the entire franchise. He may be doing that, I don't know. But nothing has come out that indicates it is that level.