As a fan of villain themes, I like the scheme theme in this one. My impression is that the villain is not exactly overtly evil, but a more calm and chill type, while also being clearly shady.
The battle themes have these great electronic melodies, but I feel it could be more intense if they are intended for boss themes (unless they are being intentionally nerfed), and would probably benefit from more dynamics, like having some parts get louder, and possibly more instruments.
The outro is very smooth and appropriately dramatic.
My favorite parts are: