Ryan has a lot of pieces, but even without that, his deep ball is much better, his mechanics are smoother, and he's no longer the statue in the pocket he used to be. Combine that with the fact that he's always been a pretty accurate QB, and it's allowed him to take his game to the next level.
This is the work he put in during the offseason:
http://www.espn.com/blog/atlanta-falcons/post/_/id/22186/falcons-matt-ryan-dug-deeper-to-prepare-for-2016-season
Maybe Flacco will be so inspired.