Just to join in, I think Harris in a way tries to play too cautious with a two gap scheme mentality. Apparently coaches wanted him to just knife in and explode through gaps and he just wouldn't. I have no idea why not, but how will he take to coaching?
As far as Lawson goes, damn, you really wish he didn't have the injuries. Really relentless and a great hand fighter. I think he'll be deadly in the run game day one. A bit tight in the hips to maneuver to a mobile quarterback, but if he has a lane, bye bye to your quarterback. He'll eat them alive.
Not the biggest fan of Barnett. Not extremely explosive or possessing the best burst. He times the snap count very well, but I think he'll be just another guy as a pass rusher. Maybe give like 6-9 sacks a season, but never be elite.