Well actually, someone has to stop him if he plays RB haha, he'd systematically end up attacking too much and thus creating a lot of danger on his side .. honestly, I don't see him accepting that, it'll be him taking a hit on his carreer for the sake of the team, he's done that enough..
I was refering to him still being able to substitute either Messi, Neymar and Suárez when needed despite potentially moving positions on the field.
All that depends on the tactical instructions that he will be given.
I am just saying that based on his speed, passing ability, pressing, technique, offensive abilities etc. he would become a very capable right back/wing back if he worked on his defensive game and tactically.
Anyway it's nothing more than a thought.
Damn that transfer ban. Zubi and the board really screwed up royally last summer. Their squad planning was abysmal to a large degree.