They went from garbage to one of the best in the league as soon as he left. He had enough time and in 2016, they were 23rd in rushing and 28th in sacks allowed at 44.
Maybe I'm missing something here but I read how our line was getting killed on both sides of the ball but we are moving the ball with ease this drive. The defense obviously needs to play better but the offense is moving along well. If the o-line was getting killed we wouldn't be moving down the field like this.