Don't fret, after a few listens I still don't like Tetragrammatron. That song is waaaay longer than it needs to be, and none of it is really all that memorable. And El Ciervo Vulnerado is such a terrible closer after Day Of the Baphomets. But the middle of the album is alright. But after what I'd heard from the band beforehand, it's a massive let down.
Though I'm a bit weird, I only like the first half of Octahedron, and everyone seems to love the second half of it way more than the first.