The team rankings are more representative of the team's performance last year, rather than the actual talent level of the team.
For instance, last year they graded the Ravens and Vikings rosters as 16th and 29th in the league, respectively. This year, they rank 3rd and 8th. Did they get that much more talented, or did the team perform better due to key adjustments, and thus raise expectations?
This year they rank the 49ers roster 17th in the NFL. My hunch is we're way more talented than that, and we're making the necessary adjustments to play up to that talent level. Don't be surprised to see us more highly regarded by the end of the year.
[ Edited by SofaKing on Jul 5, 2015 at 3:12 PM ]