Despite the bitter disappointment of how close we came, I fear complacency and injuries may set us back. Also, Frank Gore is on the backside of his career. I don't expect him to duplicate last season and Hunter is not big enough to stay healthy and replace Gore's production.
Also, the 49ers were very lucky with injuries last season, WRs notwithstanding. Lack of depth on both the OL and DL could be highly problematic if injuries start to hit. Example: the Rams of last season. There have more talent than it appeared but the injuries just killed them.