So, recently the two aforementioned buffs were nerfed to add some variety to groups and to get away from caster heavy groups yada yada. Problem with that is Chaos Brand increases magic damage taken by the target… at least seven melee specs do magic damage… meaning the nerf that was supposed to make them more viable just nerfed them as well.
Specifically those specs are assassination and subtlety rogue (outlaw also does magic damage via poisons but it is a very small amount), unholy and frost dk, Survival hunter, havoc demon hunter, ret pally (don’t really play one and forgot they existed, sorry.), and enhancement shaman.