After Pogba got injured, I think he took Pogba's role and Fellaini took his role and he was very good going forward. Suddenly, we started seeing the old Herrera which we get to see only few times in a match. He was driving with the ball, pressing up the pitch, combining with Mata.
I think this defensive role shackles him. Think the back passes and safe play are because of a specific instruction and he has been asked to pass the ball to Pogba whenever possible. I don't know if I am right, because if so, then that is a waste of his talent and something LVG tried to do too got criticized a lot for. He is a more complete CM than Pogba and is far better at moving the ball forward from deep.
Good performance overall. He is the one who will be missed the most in to coming matches.