I 100% agree it is a "night and day difference" HOWEVER so hasn't the bad tackling been a major difference. If one goes to when Dareus was on the team - the defense run statistics weren't that much different from when he was in the game or out. IF we extrapolate that information... it would sort of show pretty close to zero correlation with Dareus and our defensive run game.
I am not a Dareus hater NOR I am sad he is gone. I just think people look for easy answers when things do not go well and all the "hot takes" without further analysts shows. But I guess that is what makes a forum a forum!