I don't have the knowledge or experience to give helpful feedback like you mentioned hoping to get x3 I'm a noob who knows nothing about the technical side of things, so I can't comment on those aspects, but what I can comment on is feeling, haha.
The whole OST does a brilliant job of representing the narrative you described for the game! And as someone who has suffered with severe anxiety & depression for most of my life, some of the tracks certainly resonate with me :3
A Glorious Gone, in particular, because it reflects how I feel when it seems like I've lost the ability to even be myself >.< When I listen, it makes me imagine a physical representation that mirrors my state of mind, like a ghost haunting its own home.
And then Newfound Power also feels like an accurate reflection of how I feel when I start to gather parts of myself again. It's soft and fragile but also carries a sense of purpose & quiet determination to never give up :D
It's always exciting to hear themes of mental health represented in music, as it's a subject close to my heart, and music is a big part of how I cope with life, haha. Thanks so much for sharing it :3