Some nice subtle tone usage. Had you ever considered some breaks via track reversing? I know Brosius made some extensive use of flipping piano chords and minor riffs to get that kinda ethereal quality. Usually within very small bars but it's a fantastic means of being able to, "feather in" change ups so to speak. Also I'd say anywhere you can add some organic sounds (usually just from samples) to texture the mood to be more scene specific. Bells, clocks, machining even various kinds of animals in moderation can really drive a mood when used in moderation. Maybe experimenting with tracks by choosing a details directed theme?
Lastly the grand presence of stereo. This is something Brosius excels with and that is the capability of, "throwing" those samples and lead elements around the left and right channels. This is something I've really been trying to come into myself (so I don't mean to come off as preachy if I do) but it's such a fantastic method to make a track feel alive and vibrant. Only downside is the overuse of stereo leading to player disorientation by misleading or constantly unpredictable hit sounds, so it's a challenge. This can be advantageous if the tension is intended by design, as well minded stereo usage can make the player second guess what's being perceived.
Overall I think there's some great layers here and the advice is just me being a nut about all things sound.