Another cool trick I've seen used in Tirna Scithe was someone (I'm not sure if it was a priest or someone using an item?) mind controlling the gorm before the last boss and making them jump off the cliff, where they despawn. I was confused because I thought priest MC only worked on humanoids.
I'd see this "fixed" purely do to the number of highly toxic (and low skill cap) pug players rage quitting or kicking people that properly perform this "skip". It's easier for blizzard to "fix" this than deal with the harassment of players.