Bare minimum, Gurley is a competent RB. Having even an average level offense around him makes all the difference in the world.Last year he was definitely slumping. Bad OL, no other weapons to take the pressure off, historically bad rookie QB, and unimaginative playcalling didn't help.
I'm not saying its just him--McVay, the playcalling, some other weapons on the offense, and Goff improving are helping him a lot. But he looks good this year, compared to last year.