They didn't have ilvl advantage, but they only got blackhand so fast compared to other bosses (they were 15th on BF/Maidens) thanks to exploiting transcendance to negate massive shattering smash (which was hotfixed soon after their kill), I guess you could make a case of "creative use of mechanics" but completely evading the main P3 ability and making this phase tank&spank is just plain exploiting in my eyes.
> You don't need to soak debris apart the one that lands directly on your raid
> You have full dps from whole raid (and you can bring whatever you want class wise)
> There is no soft enrage to going out of space
Fact that they couldn't rekill the boss for 2 months after hotfix shows sth as well.