I think TFA’s score (just like PT’s score) wasn’t as great as OT’s scores, because it didn’t match the movie almost shot-by-shot (like in the OT), but more like scene-by-scene. That’s why I found the ending theme so “flat”: it’s not that it wasn’t good, but it didn’t work together with that scene.
Just watch the trench run’s scene again to ~~see~~ hear what I mean: after so many views, of course I already know what is going to happen, but the music builds the tension so much, it’s always a true experience!