Throws of over 20 yards certainly aren't a detriment, because the more of those you complete, the more likely you are to score from anywhere on the field. Some of our drives that end in punts would end in TD if we had more successful 20+ yard throws. Also, even though deeper throws mean more risk of INT, the quick scores that result from them mean fewer plays per drive -- and fewer chances to make drive-killing mistakes.
Right now, we're in the top 5 in TD per drive, fewest turnovers per drive, and fewest punts per drive. Is it sustainable without an increase of big plays? That remains to be seen, but through five weeks, this offense has outscored the 2014 version on a per-drive basis. The 2014 offense has the edge in per-game scoring only because of having more drives per game.