Honestly I don't see why everything thinks KJC is OP. There was a thread about 2 weeks ago explaining it. For Destro and Demo KJC isn't really needed anyways, but for Affliction it really is. Just the fact of not keeping 65% MG uptime on single target will destroy Aff imo at least. Demo has meta and free movement and Destro has plenty of instant casts given that Fel Flame is almost as good as Incinerate. Not to mention the 30% slow is what keeps it balanced and separates the good raiders from the rest.
What does Blizzard expect Affliction locks to do though... Fel Flame=massive mana and not great dps.
Overall though I really dough they will change KJC. After all, Blizzard has came out and said that the model of not being able to move and dps at the same time feels old.
Obviously this is aimed at Affliction because it will affect affliction the most. Just let me know what you guys think. Will it really change?