It appears as though after the gate to Dralnok's doom got moved below again, players can no longer get attuned to Dralnok's Doom.
The gate shows unavailable.
I was helping a friend get through the quests to get in, and after speaking to Sergeant Dylan and getting The Torturers, he is unable to port into Doom.
He deleted, relogged, took the quest again, same situation.
I then took a character of mine that had not gone through the quest and am also stuck on that character, the gate is unavailable, also at The Torturers.
Other characters that have already entered are able to get through the gate without any problems.