I was pretty disappointed when Iconoclast was released. If you can get past the lyrics (and if you enjoy Symphony X, you probably can), half of the album is very strong. There's a few so-so songs in there, too, but the overall vibe of the album has very little of the old Symphony X magic to it. Sure, the polymetric stuff makes a BIG return here (especially after Paradise Lost, which has ONE polymetric section), but the synthetic cliche "machines ruling the world" was just too much for 12 songs.
The best songs here are, in my opinion, the ones that use organic grooves mixed in with the synthetic stuff. Heretic and Prometheus are some of the coolest "aggressive" songs the band has ever written if you ask me. The title track and Reign (with that sweet Opeth section) are excellent bookends that encapsulate the album efficiently, but unfortunately there's four or five tracks within that just sound stale for this band...
Bastards of the Machine - The verses are Dio-ish and catchy as hell. The rest sounds like it was written in 10 minutes.
Children of a Faceless God - I like the main groove, I really do. But this song just plods along and goes nowhere. The chorus is boring for Symphony X.
Electric Messiah - People love this song, and it's intense, and it's "fun," I guess... but I like my Symphony X with less X and more symphony.
Light up the Night - Written in five minutes? Truly one of the worst songs this band has ever done.
Lords of Chaos - Slightly better than the previous debacle, but this sounds like djent. The bridge is cool and sounds like Dio, though.
Honestly, I was debating throwing End of Innocence and When All Is Lost into that list, but they have slightly more redeeming qualities. The former is a very safe and commercial power metal song that is decent but never really takes off, while the latter is good by itself but stale, straightforward, and boring when compared to the band's pre-Paradise Lost ballads.
The other five songs are some of my favorites the band has ever done. Yes, even Dehumanized, which has some nu-Symphony X elements. But I love the groove. Polymetrics are all OVER this album!