I liked the instrumentation on that track, but honestly the vocals felt really forced and only stuck out as something I could grab onto during the chorus.
Even though I love Haken with all my heart that's something that I find in their music a lot that's not entirely to my liking. Because most of their songs are in weird time signatures and such, lots of vocal melodies feel forced to me because they get accented often with the odd signatures. I get used to them after a while, tho.
I sort of know what you mean in general, though I don't find that myself, but I have to say I love the vocal melodies in this song and not just the chorus. The vocal lines in the verses are dark and brooding (my favourite part being "Confronting facts to prove the fiction, right to the point of mass extinction"), the pre-chorus is nice and the chorus is a typically huge Haken chorus.
EDIT: Oh and on the point about the vocal lines being awkward because of the strange rhythms, I do agree about that on first listen, but once you know the rhythms, it's f***ing awesome.
Except the rhythms for the intro, where I've heard the song like 25 times and I still have no idea what's going on.
EDIT 2: Also, there's a recurring theme that I had totally failed to notice before until I saw the lyric video was that the bridge section halfway through recalls the chorus from 1985 - not really melodically, but lyrically. I therefore missed that from my review.