Fun fact: Out of all named Duskwight-model elezen in the game, there might be more NPCs that were mistakenly set as Duskwight than we have genuine, still-living Duskwight. There are
definitely more Ishgardian NPCs set to be Duskwight for aesthetic diversity than there are actual named Duskwight; because Ishgard closed their borders before the Gelmorra/Gridania split, they can't be genuine Duskwight. (The most famous of those would be Ysayle.)
That said, while I've constantly been almost comically disappointed, I do have faith that they want to do something with this
sometime. Nearly every single expansion has a little bit of Gelmorra/Duskwight Lore to remind us that they're not forgotten; ARR had Tam-Tara, Toto-Rak and the Lancer questline, HW had the Palace of the Dead, Shadowbringers had that one Dancer quest, and Endwalker had talk about the actual events that led to the Gelmorra/Gridania split. They aren't forgotten, they're just neglected. And in fairness, perhaps we only notice the Duskwight are neglected because they're one of the few subraces that originally hail from somewhere we've actually been.
All that said, I will caution you: we actually can't say 'there had been plans in 1.0' about nearly anything. We only properly know a few things things about the original plans for post-launch FFXIV 1.0:
- They didn't get to do it,
- They wanted to do Musketeer and Arcanist,
- For some reason naval battles were on the list.
There's no actual proof that they were definitely 100% going to do Gelmorra Stuff. However, we can reason they had more interest in Gelmorra Stuff than ARR did, going by the fact endgame currencies were Gelmorran and the game's existing content included a third Gelmorran dungeon. For presumably a number of reasons, Gelmorra got shuffled back in priority when Yoshi-P took over.