Official Blizzard Quote:
Since the changes seem to be causing confusion, here is the new tooltip.
“Send your pet into a rage causing 50% additional damage for 10 sec (down from 18). While enraged, the beast does not feel pity or remorse or fear and it cannot be stopped unless killed.”
The tooltip doesn’t say this, but it now breaks all forms of CC that a PvP trinket would break (including Cyclone, Sap, etc.).
“Increases all damage you deal by 10% and while your pet is under the effects of Bestial Wrath, you also go into a rage causing 10% additional damage and reducing mana costs of all spells by 20% for 10 sec (down from 18). While enraged, you do not feel pity or remorse or fear and you cannot be stopped unless killed.”
So the changes are:
Duration lowered.
Passive hunter damage buff added.
Now breaks all forms of CC (whatever a PvP trinket breaks, including Sap and Cyclone).