well....

that opening texture was sick, lots of rumbling sub. Swelling was nice and it definetly has a nice dark feel. But for being 5+ minutes, its goes nowhere at all. The strings dont do the track justice. Theyre just a normal generic texture just playing one long note....

so youve got a nice bass texture filled out buts that really it. needs more for sure. Add some melodic stuff, maybe some detuned piano keys, some higher register background FX, throw them in some reverb and pan them. Continue with the strings, but build chords from them, something dissonant would suit the atomosphere. some subtle experimental percussion might work nice. But for 5 minutes, you definetly need to build upon what you got here.