I didn't get the attraction of the setting.
The problem is, its try to be many things, use too many settings and ideas at the same time in an amalgamation that, Frankly, it doesn't work. Either the military swallow the mystic, the mystic swallow the Horror story or the Hollow story get swallowed by the badass adventure.
Too many chef ruin the soup, indeed.
It has most plotholes than asteroids and the Grimdark of the setting produce Darkness Induced Audience Apathy
and record time.
I stopped trying to make sense to the story and what it get was so alien, so 90's, dark emo generation X as to be kind of silly.
Beats me why this kind of settings had so much effort or fans. Seems kind of masochist to swim in such dark, depressing settings but that just this Troper.
The reccommendation: see the setting, get one faction or idea that you like and throw away the rest.