the in-game WS soundtrack doesn't contain the full wither storm theme found here: https://www.youtube.com/watch?v=WvZ3hwwRSkY
my idea is that the full theme should be implemented as the soundtrack.

also maybe the early part of WS destroyed should be played as an ambient music in the bowels?

You can make a resourcepack to change the music.

Didn't pick this out earlier: #227

Didn't pick this out earlier: #227

?
that one's saying dynamic music (music depends on situation), i'm saying up until 8:05 should play as the theme instead of getting cut off at 4:01

Ah my bad, sorry about that

More parts of the theme will be added in the next major release.