Bungie knows as well or even better than anyone else that music can make or break any moment in a game. The cover of the Sepiks Prime Theme in this week's update (link above) gave me chills man. This song immediately had me thinking of an epic Servitor raid fight or a revamped Sepiks encounter. I think I would really like to see some moment in end game content that utilise more hardcore/tense music to really push the mood and atmosphere of the experience. I always remember when I first "woke the hive" during the beta and that intense music that started up as soon as that door opened. Its a moment in destiny that I'll always remember because it made the sudden flood of hive so much more stressful and intense!
I think the game would benefit from straight up hardcore music to add a little more garnish to their already flawless gameplay.