Betis could really use him, I'd take him at forward over those bumbling "forwards" they played against Levante.
He has really looked good this pre-season for Barca. I'd rather see him be used before Munir or Paco at forward, and before Denis and Alena in midfield. Still, to get significant playing time, he has to move ahead of the likes of Malcolm, Arthur, Roberto and maybe Vidal. For Rafinha's career, it would be better to go to a different team.
I'm a fan of Roberto, but in the offensive midfield positions, I'd take Rafinha over Roberto.