He should've been further forward given the conditions the punter was punting from - wedged back in the end zone with less space between himself and the return team, it was bound to be a weaker kick. Don't know if that's Hayne's fault or the special teams coach.
I was a bit surprised to see them go with him as the 3rd RB (2nd after Bush left the game), but it's just as well, because it looks like he's been beat out of the primary PR spot.
He did OK by and large. 3.3 yards per carry is decent, although by comparison Hyde, the 49ers #1 back, tore it up on the ground.