Does anyone miss this? I do, this was one of the main reasons I enjoyed my hunter so much in Cata. I don't know how this one felt if you were on the receiving end, but for a hunter it was just great. Even outside of organized PvP, in duels or world PvP this was great fun. Being able to reduce the movement speed of a Pala or DK sitting on a flying mount by 90% (!!) enabled me to kill them in air, if they dared to come close enough to ground level for a split second only.
The bad part is, that it wasn't a nerf. In MoP beta they experimented with merging concussive shot with arcane shot, which didn't play out well, so they reverted the change. The glyph got lost in the process, it obviously got removed simultaneously with the concussive shot removal, but didn't get restored when conc. shot made a comeback. Not many players complained about this on the forums. I'm gonna do a thread soon, but only on the EU forums, and I don't know if those are of any importance to the developers, and obviously anyone who's not a hunter will say "no" to this glyph.