I have to admit, I enjoyed it a lot more before I bothered paying attention to the lyrics. I thought Sacrificed Sons was some kind of a fantasy story about war, but 9/11... Maybe if it was on Six Degrees of Inner Turbulence, or even Train of Thought. But Octavarium, I mean, nobody forgets the terrible tragedy that it was, but by 2005, everyone had a chance to reflect on it, and process it, and interpret it in their own way, so the lyrics really didn't add any new or unique perspective on the events. That's the downfall of this song I'd say.
The composition, though, is absolutely magnificent, from the music, to the vocal melodies, there's nothing bad I can say about it at all.