See, that's the fun thing about the tritone, it could be minor or major. I love that the intro is completely ambiguous as to what key it's in. I've listened to it at least four times now, and holy crap, it's one really cool piece.
Obviously, this being a WIP song, I can't fault it for things like it feeling a empty or not being long enough. You're not done with it, so of course it won't be either of those things. Most of my criticisms are things that mostly from the fact that you're not done with it, and you still need to add stuff to finish it. I think the drop needs a bit more of an impact, or at least the lead up to it stays silent for longer to make it impact harder. And, while space is filled quite well with everything you do have already, I do think from 30 seconds to one minute, it needs a little bit more to it, as does the main part of the drop. I do like how the basses sound, quite a lot. They sound excellent, and work really well for the style.
The drums impact well, you've mixed everything very well, and it sounds good. I think at some point an open hi-hat on the upbeats of the main drum beat after 1:37 (so the end of the WIP track) to add a bit more energy would be great. Or at least, something on the upbeats to give it a bit more bounce. It already has some good syncopation, though, and it could obviously get a bit cluttered, but I still think that would be a cool addition.
All in all, while that's all I have to say, I'm loving this piece. I really want to see how you continue this, because I love it! For now, though, 4/5!
Take care!
~Zach (AlphaStorm)