just finished reading through this amazing topic and want to first say thanks - it's an awesome reference and discussion, and i'll be going through it more as i repeatedly listen to all 7 soundtracks and rewatch the films leading up to TLJ
i did notice one thing today in my listening:
on TPM (OST) The Arrival at Tatooine... 0:40 Unknown 2, i hear the first 4 notes of kylo's main theme repeating down an octave
i'm surprised i never noticed it before, but it really stood out all of a sudden in my mind and made me picture kylo landing on tatooine
obviously no intentional relation, although a fan theory on that connect would be amusing!
also looking forward to hearing more about the aforementioned Emilio's book