DT12 didn't really have many memorable instrumental moments.
This is actually one of the biggest reasons why I love that album. If the last decade is any evidence, Dream Theater doesn't really have it in them anymore to write long, complicated instrumental sections that actually
benefit the song. LaBrie will be singing this great melody and then WHAM!!! Enter five minutes of out-of-place nothingness. See Endless Sacrifice, The Ministry of Lost Souls, and Outcry for examples. I think this may be due to Rudess - he's a master player but almost nothing he does contains any emotion to my ears. I far preferred Kevin Moore and even Derek Sherinian.
I feel that ADTOE was a necessary growing step away from Portnoy's immature "bad ass" metal sound that became tiring since Octavarium and reached downright obnoxious levels on BC&SL. In short, Portnoy was a
huge contributor to the writing style of the band, and simply put, it became stale and predictable. As for ADTOE, I think Bridges in the Sky and especially Breaking All Illusions are two of the highlights, but the last track (Beneath the Surface) is my personal favorite. It's nice to hear Dream Theater exercise some serious emotion and restraint. Damn, that is a sad song.
DT12 (is that what we're calling it now?) really is a great album. I get a bit bored with some of the instrumental stuff in Enigma Machine and Illumination Theory, but luckily neither section lasts long enough to annoy. There's some
really strong melodies on the album - the Rush-ness of The Looking Glass, the emotion of The Bigger Picture, the futuristic hopeful feeling of Surrender to Reason - that are very different for Dream Theater. And the heavier songs (The Enemy Inside, Behind the Veil) sound
far better to me than most of the recent heavier Portnoy-era stuff (imagine the chorus of Behind the Veil with Portnoy "tuf-guy" vocals to fill in the gaps).