I think its great he has been recognised. International exposure will help him mature as a player, as he is still very green in a lot of respects. Brazils fairly solid defence probably need a bit of attacking flair, which he has in bundles.
I think Rafa has got the ability to be one of the best full backs in the world one day, just needs to work a bit on the mental side of the game, makes a lot of stupid decisions sometimes when he's having a really good game, just pure moments of madness and people forget about the good side to his game then.
Still remember his amazing celebration from the bench when Nani scored against Spurs. For that I will always like him, no matter what mistakes he makes.