I don't know how much you pay your Music team, but it probably isn't enough
So far you've had a couple of - almost - failing areas in the game of LoL (which is to be expected with every game), for example: Balancing teams haven't always made great decisions cough Ryze cough, and the Lore, well... don't really know what's happening there.
But one thing that you have always gotten right - your music. Whether champion themes (Ekko's and Braum's were brilliant, imo), or the new Bilgewater map (gave me goosebumps), your musical department has yet to fail us.
In short, take whatever you're paying this department, and triple it; then it'll probably be an appropriate salary.
EDIT: If you wanted to hear the new map's music Here It Is.