Yeah, I know it's all new mechanics. But NiM being on the PTS would spoil world/server firsts. :/ It's why, outside of initial tiers, you don't see heroic bosses on WoW's PTR. Hoping for the same thing here.
There are no more world/server firsts because most all of the guilds who care about that have already quit and unsubbed. Look around, there are only a handful of us left.