They did it on purpose for some specs to hit with DF or shadowlands numbers. I found the math (from US forums) for demo warlock and it s just laughable. I suppose it s the same for fire mage.
Demonology garbage DAMAGE WISE in PVP (and not only). As it follows, looking at the math, they do it on purpose, they destroy the spec on purpose.
Imp Gang Boss, Spiteful Reconstitution, Carnivorous Stalkers, Shadow Invocation, Umbral Blaze, Pact of the Imp Mother, and Pact of the Ered’ruin.
Immutable Hatred (a last row talent!!) doing 29,000 damage a hit, which comes out to .41% of a player’s hit points.
“Bilescourge Bombers” the spell, not the effect, is still doing Shadowlands numbers.
A set of imps shoot for roughly 11k a shot, times 3 imps, for 5 shots each, that comes out to 165,000 damage. That’s about 2.36% of a player’s health pool that has 7,000,000 hit points.
Call Dreadstalkers comes out to about 25,000 a hit, 8 hits in total per Dreadstalker over 12 seconds, which is 400,000 damage. It ends up being roughly 5.71% of a player’s health using 7,000,000 hit points over 12 seconds.
Demonic Tyrant: If a player uses the new hero talent “Abyssal Dominion” from the new Diabolist Hero Talents, has 2 Dreadstalkers, 1 Charhound, and 6 or more imps, it hits for about 345,000 a shot. This comes out to roughly 4.9% of a players health pool if the player has 7,000,000 hit points, meaning it hits only for 345,000 a shot in PvP
THE ONLY spell they buffed to make it function above Shadowland numbers is Shadowbolt and the only reason they did it is because it s a common spell with afliction.