He is stepping into the pocket a lot more often instead of having to almost immediately scramble. Trust is a big deal. I bet if you watch his sacks taken last year and this, they happened outside or on the edge of the tackle box in most cases. A pocket is being created for him to stand in this is also why the run game is doing so well we are getting push up the middle.This. I don't remember HH getting nearly this much time to throw last near. Correct me if I'm wrong, but it's a noticable difference from last year. More noticeable is the difference in gaps for the RBs.
Interior line play on both sides of the ball has improved a ton since last year.