Yes as I've previously said, it should be a buff/debuff that we can put on enemies or our pets to let our melee spells land right in front of said target. If the buff were to be placed on our pets it would give more meaning to the spec (a link between the master and its pet, instead of it being a +X DPS and -20% dmg taken).
Demo should perform better than others when in melee, not as much as them.
As for Hellfire merge with Immolation aura, that's exactly what they're doing. It's quite disappointing in my opinion. I love my AoE burst