They're not broken. They just increase your chances of heavy drops. If you aren't getting much heavy drop it's just bad luck. Can't even believe how much heavy I leave behind using those. And not only does it increase drops rates, they increase the amount picked up. So one drop is about 4 or 5 rockets as opposed to 1 or 2 without them. It's an amazing piece of armor. Not to mention it just looks insanely good and goes with any shader.