We have all seen Athrun pilot his gundam right after beeing shot... twice... Kira survived a nuclear explosion and piloted strike rouge shortly after... besides... I think we all agree there's No way that I-Justice would perform l33t without Athrun piloting it.

Besides like Mite Gai said. There's no way Athrun will stand still when Cagalli is in danger... although Kira will already have saved her... .... .... ok well anyways Athrun will pilot I-Justice even if he has to crawl to it (that would be funny).

What i'm curious about is what did they do to I-Justice to improve it much... I know S-Freedom has the Dragoon system but can someone tell me what I-Justice has that's really amazing... (or is it just appearing in the show for the sakes of appearances?)