#1 - Feb. 25, 2017, 3:30 p.m.
The animation is being swapped to the survival hunter's grapple, except lower res and with a glow effect. The iconic purple energy grip that we currently have is completely scrapped.
Likewise, because of the new slightly glowing chain animation, there will now be projectile travel time in addition to the pull time, so Death Grip is now noticeably slower than it is in Live.
The old animation is not going to have a glyph. We are forced to use this new animation.
I've been asking on the PTR Class and General forums for a while for communication about this - in my opinion - rather painful change, but to no avail. A twitter post from a month ago asking for a glyph for the old animation was met with
"Is there something about the old Death Grip animation that you feel is missing from the new Death Grip animation?"
and no further communication since. At this point, it looks like it will be affecting Live, and I figured that asking General is the last ditch effort we have on getting the old one added as a glyph...(Or better yet; The new ones being the glyph, but we all know that won't happen).
Link to the PTR Forum post:
https://us.battle.net/forums/en/wow/topic/20753100383
Link to the Death Knight Discussion post:
https://us.battle.net/forums/en/wow/topic/20753515756
I've been showing this animation out to my friend group who does not look at the WoW forums. They are very upset with this change as well, so its not just the forum community up in arms.