Evasive fire (covering fire rune pref) is becoming a much more popular primary hatred gen spell for demon hunters because it can shoot through most barriers including wallers walls. It works through most but not all structures in the game (diaf soul lashers). This is showing up on other forums a fair amount, but haven't seen it here.
I replaced hungering arrow with evasive fire yesterday and made more progress in act3/4 inferno than i've ever made since starting the game. Just have Big D left now.
It's especially potent if you time a full sharpshooter stack with nether tentacles.
e.g. cast ~3-5 NTs until they approach the mob, then use evasive fire 2-3x so they all hit about the same time and you get full crit benefits.
Not sure it's intended to work through walls like it does currently, but use it while you can.