Sora having his back to us isn’t supposed to paint so much of a somber picture but rather, like DGH said, one of self-introspection. Calling back on what Nomura said on how friendships change with time and people may part from each other, this could very well represent the message that even though his friends are far away, they are always connected to him.
If it means something else, I’ll be surprised.
If it means something else, I’ll be surprised.