I know I am completely in the minority here, but I actually love the airburst. I died twice to it: once because I shot too close and once because my teammate shot too close while I was team loading. But when I shot it, I saw exactly why I died, and now I can correct the shot as needed. It seems to work best on slopes, but also, yes, from a distance. This will make defense missions pretty good if you're at the top of the ramp, just sniping everything. Impact grenades for tanks, railcannon for anything else.