You were right about the volume issues. It is REALLY quiet.
The switch-up in track 8 was super cool and a great way to refresh the listeners attention! The bassline was super intimidating!
I do wish that the OST kept more time for songs in the style of The Summer Night. It felt like it was one and done in terms of suspense. I can hear the suspense build slightly over the previous tracks, but another dread inducing track or replacing one of the other light ones I think might improve the pacing just a bit.
I also wanted more songs like The Joy because I just liked that ones vibes the best. Higher energy is what I like personally.