I'd like see a Bardam's Mettle (Hard) where we delve deeper in the ruins in the latter third of the dungeon.
We really don't know much about the history of the Xaela, so getting more insight into the age where they were a united people would be interesting.
They also dropped that little bit in the second lorebook about cults strangely reminiscent of the Lambs of Dalamud starting show up amid them that could serve as a reason to delve into that place, because we don't need a bunch of voidsent-summoning loonies over in Othard as well.