The Steelers might have completely revamped their offense from just a couple of seasons ago, but the defense has just gotten some tweaks.
Joe Haden? Gone, still unsigned in free agency. Stephon Tuitt? Retired. Joe Schobert? Released and still unsigned in free agency.
As for the rest, it returns mainly intact, with some key free agent additions.
Flush with cap space for the first time in decades, the Steelers were more active than they ever have been in free agency. And they didn't spend their money on just one side of the ball.