I'll just address this question since you asked it, but I'm just here to provide insight, not get sucked into the thread. If we had a different defensive coordinator, there's no predicting what guys we would or would not have gotten. I entirely believe, however, that without Roof neither of the Swillings would be here, and we wouldn't have the strong connection to Buford and Gwinnett County that we do currently (Gantt, Roof, and David Curry are all Buford products and Roof recruits, and Roof is the area recruiter for Gwinnett County, which has long-been a talent-rich area and only recently has GT started to have success recruiting the area)
I also disagree that the defense isn't improving - yards per play, yards per game, and 3rd down conversion percentage were all improved this year for the defense. The only reason points per game didn't improve is because we routinely gave the opposing team great field position via special teams blunders. Obviously, everything - offense, defense, special teams - started to go downhill after the Virginia game and collapsed entirely for the last 2 games of the season, but that was just as much the players giving up as it was coaching and scheme. What I saw during the Duke and Georgia games was a team that was broken in spirit and gave up on themselves and one another. That's on coaching, absolutely, but the players have to take some responsibility. The coaches can put them in the right positions, but if they can't make the play then it's not a fault of the scheme, which to my understanding is everyone's sore spot with Roof. That's just my personal opinion on some thoughts over the defense, since you asked if it matters if we are bringing in better recruits if the defense isn't improving