I've gotten a few sick kills with it, but I think you need literally every shard to hit the guy. And that almost never happens. I like its behavior better than the vortex nade, which makes me sad because it's underpowered.

I agree. Tried it... no power! Vortex is better imo. Especially with the right upgrade. It lasts longer and actually kills!

I feel the same way. I've switched back and forth about 4-5 times to keep giving the scatter grenade multiple tries vs the vortex. It's just not doing it for me, I don't find it nearly as effective doing damage or blocking a passageway.