The ST will be better, no doubt.
We lost a backup corner and one good starter, but the CB were not the strength of our defense. With Raji back this year, HCD with a year under his belt and better depth with the young DB (watch Randall in the slot in the nickel this year) the defense will be better. I didn't even mention more Matthews inside, because that may or may not happen, but I bet we see more of that in the nickel as well.
On offense, the emergence of Adams and development of Janis and Rodgers (TE) will make that side of the ball even better.
Meanwhile, Dallas has lost their RB and added two felons on defense already causing a stir down there. Seattle's O-Line has lost even more, and the league is starting to figure out how to beat their secondary (outnumber them...not all their guys can cover).
I am more concerned about the improvement of the Philly defense, the great draft again by the Vikings and the continued building of the Rams and Cardinals. While I still think the Packers are the best in the NFC this year, the playoffs are going to be a dogfight.
I think Philly, GB, AZ and Carolina win the divisions, with Seattle, the Rams and the Vikings duking it out for the wild cards.
In the AFC I have Miami, Balt, Indy and Denver, with NE, Buf, Pit, SD and Cin all in the fight for wild cards.
"The difference between genius and stupidity is that genius has its limits" --Albert Einstein