You think they’re hard now? Cata release would’ve snapped you in half lol. They got nerfed multiple times when they were current, and these days players have access to tons of additional stuns, AOE interrupts, defensives, live control, and kiting options they didn’t before.
Grim Batol is one of the easy ones too. The dragon bombardment hasn’t been properly adjusted for the stat squish so you basically just obliterate 2/3 of the trash in the whole dungeon instead of softening up the worst pulls.