The over head burst feature is kind of stupid in my opinion because of the fact only a small amount is actually directed toward the ground. Plus those rounds are very small, 20mm is too small for that kind of feature, half the warhead is the electronic fusing. You are much better off using it with a high trajectory 40mm round whose warhead would be coming down at the enemy, not over him.
These people didn't look at how the weapon or weapon system in terms of how it is used in infantry warfare. They center it more so on its effectiveness as an individual weapon and that is wrong. Plus this thing just plain has ugly features like a 9.8' barrel for a 5.56mm round and the 13.5 pound weight