The 49ers have shown how hard it is to build from the draft nowadays. In recent years they had the Offense and built a young Defense through the Draft, however, with the learning curve, and as jakethompson pointed out injuries, by the time the Defense was set, the Offense has gone. They will struggle this Year but barring injuries, The Defense will make them no push-overs, especially with Nolan in place of the dinosaur Erickson and given the fragility of their Division rivals, will possibly surprise some people.