The reporters keep asking about the run game without asking the obvious question. Why did they change to a zone blocking scheme? The only missing pieces from the last two #1 rush offenses are Felton, CK, and Gilislee.
It is a legit question. They could have redone the entire pass offense and simply left the run game as is. The formations are really no different.
I think the reason for the poor run game is more about the defenses they have faced and not scheme. But they faced 8 guys in the box last year too.