I dunno... Noel looks like an adult to me; or at least some of the guys I went to school with who did marathon running had a similar type of build. Trim the hair a little and give him better clothes, and he'll look better, imo.
The only thing I liked about Snow was the part when he went shirtless for part of a chapter. Edit: And Troy Baker. The part where you can choose to sing a song and Snow responds that he can't sing for crap was pretty funny since Baker can actually sing well.
Which makes sense in Japanese.
But in the English version, it's kind of weird that Serah never refers to her by her actual name, even in tender scenes. It's almost as if Lightning conditioned her to call her by her codename as opposed to her real name.