Yeah, disabling it would be nice. It has been removed on retail!
And for other maps, I guess that they are fine; at least not bugged. They are no longer what they used to be though.
On wowhead it says added in 6.0.1 but it's actually added in Pandaria database without allowing players to obtain it.
Meaning? It is available to players. I just saw it today with a player in a bg (I guess he's a GM/mode)
https://www.db.pandawow.me?item=112326/warforged-nightmare