I haven't had a group completely collapse in a TW dungeon since patch, they've all been salvaged with one leaver at most, but Arcatraz has had the most wipes on trash. I do TWs as an Unholy DK with 20 gem sockets, so the dps is totally broken when we overpull somehow and I can avoid some accidents with death grips/chain hooks like tanks fighting the void things who cast fear too close to other adds in Mana Tombs. People don't seem to be attempting to soak or avoid damage at the moment though, when people do they go by very smoothly, healers who never cleanse anything or just haven't figured out how their spec works since patch, dps who stand in things, pull rooms with barrage etc, tanks not using mitigation very efficiently.