Is nightstalker broken on D2?

So either I completely suck at playing hunter or nightstalker has some serious issues compared to the beloved class in D1.

Played like 15-20 games and I have only successfully shut down another super once. Most of the times I shot it right in his range but he jumped and was completed unaffected. I mean he was really close... no more than 2 bodies away from the purple ball.

I have a suspicion that the D2 shadowshot can only tether those really close and not in the air when the shot was down? Please enlighten me so I can adjust for this stupid D2 super.

Or, Bungie, plz fix this shit.