Which time?
It wasn’t that Nazgrim had to be nerfed, it’s that he received multiple rounds of nerfs and was still being nerfed 8 months after he came out.
Because the easier Blizzard made the fight, the worse people became at it.
And note that all of these changes were for LFR only. The fight never had to be nerfed on Flex, Normal, or Heroic (which are now called Normal, Heroic, and Mythic, respectively).
Round 1 - 1 month after release
Changes on Raid Finder difficulty:
- General Nazgrim’s health has been reduced by 10%.
- General Nazgrim’s Ravager now hits for 200,000 damage.
- General Nazgrim now gains 1 Rage when struck in Defensive Stance (down from 2 Rage).
- General Nazgrim now gains 2 Rage for each target struck by Heroic Shockwave’s Aftershocks (down from 3 Rage).
- General Nazgrim now gains 2 Rage from Kor’kron Banner (down from 3 Rage).
- Kor’kron Warshaman’s Earth Shield now heals for 2% of maximum health (down from 5%).
- Kor’kron Warshaman’s Empowered Chain Heal now heals for 4% of maximum health (down from 10%)."
So there were a general health nerf, a nerf to his rage generation because LFR cannot help themselves but to continue attacking Nazgrim when he’s temporarily in defensive stance and you’re not supposed to attack him, and a nerf to the shaman adds who heal because LFR players cannot interrupt.
Round Two - a week after that
- “Reduced the amount of hostile NPCs in the areas leading up to General Nazgrim on Raid Finder difficulty.”
Because LFR players complained there was too much trash.
Round Three - A month after that
- General Nazgrim’s Sundering Blow now has a cap at 4 stacks, allowing him to gain up to a maximum of 25 Rage (50 while in Berserker Stance) on Raid Finder difficulty.
- Kor’kron Arcweavers, Kor’kron Assassins, Kor’kron Ironblades, and Kor’kron Warshamans now have less health and deals less damage on Raid Finder difficulty."
Sundering Blow was the tank swap mechanic, and had to be nerfed because LFR tanks don’t know what a taunt is. The adds needed to be nerfed because LFR players will not switch to adds to kill them.
Round Four - Two months after that
- General Nazgrim’s Kor’kron Banner now has less health on Raid Finder difficulty.
- General Nazgrim’s Ravager no longer generates Rage when it strikes a player and deaks 50% less damage on Raid Finder difficulty.
- Kor’kron Warshaman’s Healing Tide Totem now heals for 1% (down from 2%) on Raid Finder Difficulty.
- Kor’kron Warshaman’s Empowered Chain Heal now heals for 1% (down from 4%) on Raid Finder difficulty."
More add nerfs because LFR players still won’t switch to adds to kill them, and still haven’t learned to interrupt the healer adds. Ravager was an avoidable spinning buzzsaw and LFR players don’t have the insight that standing in a giant spinning buzzsaw is a bad idea.
Round Five - Four months after that - EIGHT MONTHS AFTER RAID RELEASE
- General Nazgrim no longer calls in an additional wave of forces at 10% health on Raid Finder difficulty.
Because if the LFR players still won’t kill or interrupt the adds, just have them stop spawning, I guess.
So what was it about the fight that required nerfs? Nothing.
But there was everything wrong with the players.