29 appearances for Barca in the season before last is nothing to scoff at, I remember him setting up a goal for Messi against Real in the CL semis.
In the season just gone he was injured for the majority of it and only returned at the end of April.
He's a very good player. What we don't know is how much Mancini is prioritising the wings. Does he want a marquee winger who will start constantly, hence an expensive player like Bale or Di Maria? Or does he want them as an option and for more variety in the squad, hence less expensive but still good players like maybe Afellay?