The San Francisco 49ers home game tomorrow night against Minnesota is shaping up as another wringing of the hands over who to keep. Protecting players is a good idea however players need also to play well and often to if they are to improve. This preseason has been used to evaluate talent by the 49ers which is a good thing yet some of the competition has used preseason to perfect their play. The 49ers must consider ways to improve the O game during regular season play now, hoping their defense can keep them in early games when the O must grow some legs. Catching up to teams who used preseason more to improve O than to evaluate talent is the next task for the 49ers. Eagle Duck O attack is growing wings from tireless efforts and they will hit the regular season in full stride. Seahawks, Lions, and Eagles, are each improving O during pre-season as a focus. The 49ers protected health and evaluated talent as their preseason focus. Perfect or evaluate, the balance is a concern for all teams.