I agree with the dynamic range part. The song is really good and has vocals - yay! Maybe some differences in velocity of notes in chords in the piece would make it sound more interesting, for example the highest note plays at top, leading to lowest note least velocity in a single chord, and then the second time the same chord is used, the opposite with velocity. IDK I just think it would sound better that way. The song is a little sharp but that's not necessarily a bad thing. Pan occasionally left and right in an automation clip might be nice as well. Also the song sounds really good the way it is right now.