I really don't understand Sony's logic here. Warlocks by far have the most trouble with agro as it is. So you take our one non-agro nuke and make it agro? Rift was a great tool for strating out multi-mob battles. Good damage, no-agro, offset by the need to be close for the area to hit the mob and a long cast. With agro added, this spell has lost its greatest utility. Casting it now in the early stages of a multi-mob fight will get you dead fast.
Rift will still be usefull for pvp when agro is a given, but for pve I just don't see myself casting it very often. Please change Rift back or for God's sake, give up some better agro management than 4% hate transfer and one single and one area detaunt.