I agree that it's too much of the same cladding. I would do maybe a grey or even charcoal shade of brick up the first three floors with cor ten cladding the top two floors. There also needs to be some vertical breaking up of the wall on the longer side of the building via something. Maybe an old school fire escape or two?
Also, I would have a giant lit up billboard style sign that says "Ironworks" on the longer edge.