I remember Rey's and Kylo's music cues, but only because they were short and sounded like something from a cartoon show for 6 years old kids. The so called "Rey's theme" is an overblown lullaby.
I guess he knew the film wasn't good and just phoned it in.
Or the directions JarJar gave him were that vague and bland...
Whatever, it wasn't THE JOHN WILLIAMS.
I dunno bout that, I wonder is it the case that eventually you just run out of decent melodies and all you can do is write sound that goes up and down with what's happening on the screen.