In the playoff matchup with the 49ers, one weak link was interior OL. We need OL "Thumpers" at C and RG who can hold up against SF's front 7. It was the 49ers pass rush that blew up the game, getting the sack-fumble from Geno when the Hawks were in the red zone and a TD takes the lead.
Another fast, strong, bigger running back, change of pace from Walker, would be great too. If we can smashmouth-run on the 49ers, that slows down their pass rush.
Defense is a separate issue, and since Jalen Carter is probably gone at #5, we'll have to hope that PC/JS have a good plan for upgrading the talent on D.