They actually did log off with weird gear/reforge/talents to confuse competitor and hide what specs they were playing
And nobody "shares" raid comps with mmo, they simply read them from armoury ;P
Not to belittle Kin Raider in any way - big GZ on the kills from me, they are very skilled players.
There was a bug that allowed to silence Bloods so they wouldn't explode damaging whole raid :P This bug is mentioned in official hot-fixes. BL exploiting? No waaaay
Anyway, GZ to Blood Legion too!