The problem is Barca number 9 role isn't all about scoring goals, it's also about moving around the pitch, try to being 'play-maker' at the same time and get the ball and pass it to others but not just staying in the opponent's penalty area.
And that's why Suarez is successful, he sometimes comes back and take the ball from middle, and so on.
So Paco failed to do this especially when there is a bus parked front of you. He seems like to run towards penalty area while expecting to get a ball from someone,therefore we didn't see anything from Paco against Alaves.
I hope he improves tho, Lucho has got to do something with him.