Nunes being shunted out to left-wing indicates that Pep doesn't trust him to look after ball centrally.
His ability to break the lines and carry the ball forward is far more suited to a counter-attacking team - not the possession heavy football that we play.
Bernardo said Nunes was having trouble adapting in 1st season of Pep's style but I think he was just being supportive of Portuguese team-mate. To me, he just doesn't fit naturally into our style of play and his body language when he loses the ball is poor at times.