He's the best central midfielder in the Premier League in my opinion and he's only had 20 games. Imagine how good he's going to be in his second and third seasons...
I don't have too much of a problem with him not being selected, maybe the coach has longer term plan for him. It would be shocking if he didn't get into the WC squad in the Summer though, then I would be miffed.
On a slightly different note I was watching some game over the weekend, can't remember which one it was now, and the commentator said Argentina used 147 or 157 different players in 2013. Maybe the Brazil coach is just sticking to what he knows - could bite him on the arse though in terms of winning the comp. if he doesn't pick the best players.
You'd be digging into League 2 to get 147 English players! It's funny when you watch a team from another country and think "he's a good player" then Google him and he's Argentine. There are bloody loads of good Argentines.