I'm always the first proponent of more chord variation. While I thought it was clever how you went from Eb minor to G# minor then back to Eb minor, everything within those sections got quickly stale... similar chord progressions in the Eb minor parts and I think only a couple other chords in the G# minor section. On top of that, the same motifs largely repeat in these sections which adds to that feeling.
The horns are going to get tired of playing that. It's bellowing and doesn't really stop for a good enough breath, especially in the G# minor section.
I didn't get a sense of harshness through any of it. I got a sense of volume, definitely, but I don't think that's what you were going for.
Doesn't sound bad by any means, there's just a lot of the same for something that should be a lot more impactful.