I've watched Asa for years now, and he has a wonderful presence onscreen. When I first heard he was cast as Ender, I was thrilled--although, honestly, I was picturing him as the young Mordred in BBC's Merlin
. Of course, so many of the pictures that are up now, he's way too old and too tall--but keep in mind they finished principal photography on this, what, a year ago? So he was (duh) younger looking while the filming was going on. The shot of him across the table from Petra makes him look very young and vulnerable.
Two things: I would much rather have an Ender who looks too old, but who can ACT, than an accurately aged actor who CAN'T. I believe with all my heart that Asa will be wonderful as Ender, and his performance will make us all forget the age issue.
Secondly, if they *hadn't* cast Asa, my next pick would have been Thomas Horn, who's only claim to fame, literally the ONLY acting he's ever done, was in Extremely Loud and Incredibly Close. I've never ever been so moved by a child's performance as I was when I saw that film. He would have been an amazing Ender--or even Bean. But...that's not the way it is, and that's ok.