I always expected Ny'alotha to be a patch zone somewhere. For example, it could be the one remaining chunk of the Black Empire from long ago, sunk below the sea or something. It is unfortunate that it is just a raid but its clear they did it because the level designers are all on 9.0 by now. They probably had to choose between nazjatar or ny'alotha. It is disappointing though because I know they could have made nazjatar a new continent not just a little zone.