Drums that come in at around 0:23 have some incredible presence to them. Nice and full!
Transition at 1:17 took me by surprise, but is a good change in rhythm. I especially like the new rapid-fire element introduced a little later, some very cool sound design. I think the kick could use a little more low end/body to it, just a small nitpick.
From 4:00 on, was too busy headbanging to write anything else.
Awesome combination of sounds/genres, thanks for sharing something you put almost fifty hours into. Was a ride!