Sergi has done an incredible job and there's no doubt he should be starting but we still need to address the RB position. Our only backup is Vidal and let's face it, he's nowhere near Barca quality. Roberto will run the risk of getting burnt out if we start him in every game like this and allow him to go on those deep runs.
I am very impressed by Roberto, but the better he does, the more I worry.
looking back we've never had a solid RB backup since the days of Puyol, when he would sometimes cover for Alves and yet we've always been fine. Vidal isnt Barca quality true, but he is good enough to allow Sergio to grow in the RB position. He isnt Douglas, he can play and will allow Lucho to be able to rest Roberto whenever needed. Also finding a RB willing to be backup to Roberto will be hard, and if we find one who compete's with him , it might stagnate his development right as he is improving. I say leave the RB as is, we are fine all across the field, we have 2players per position except Busi for who we rely on Samper to fill that position in the future. And we have a perfect blend of the best players in the world now (Messi , Suarez , Ney , Busi , Iniesta , Rakitic , Masch , Pique , Alba) and the players who may become the best players in the world in the future ( Alcacer , Ney , Denis , Gomes , Samper??(big if) , Umtiti , Digne , Sergi and TS ).