I, too, agree with Noite.
So much development time was wasted on content hardly anybody uses (Temple of Erlik, House of Crom: social dungeon, Dragonspine outdoor, Dragonspine dungeon, Turan outdoor, Bori, ...).
People are still enjoying frickin' T1 raids. That's five year old content, and it's accepted better than Temple of Erlik, e. g. Even veteran players prefer to do T1 raids with twink No. 27 to raiding Temple of Erlik with their umphtastic main characters (or serious twinks).
There are still raids for the Grassland Golem. But who has seen a raid for the House of Crom raid encounter in the last... two years?
Before spending time on new content - seriously consider what the player base will accept and what will keep them occupied long enough.