Right off the bat I think we need to give The first Order its own unique theme. There was an unused track for Hux’s speech that would be perfect as a recurring theme in the trilogy. https://youtu.be/R_gSngCB_iM
Not a fan of how they didn’t distinguish Kylo’s theme from the First Order.
Secondly, The Snoke and Palpatine connection should be made more apparent musically just as it should be made more apparent narratively. For this I’d recommend Anthem of Evil and Palpatine’s teachings (Plagues’s theme) from ROTS to be played as their main theme.
https://youtu.be/PmgJSpHCGiI