Blizzard: "There just weren't as many 'catch-up' nerfs outside of a few outliers such as health nerfs in Naxxramas and direct skips to Sapphiron and Kel'Thuzad." : r/classicwow
Blizzard partners with Nerf for official Overwatch blaster - SlashGear
Battle for Azeroth PvP Nerfs for Healers, Rogues and Mages Rolled Out; Blizzard to Address BM Hunters, Disc Priests & Arms Warriors Soon