[Spoiler] Isn't Dark Knight using Akasa ?

[Denishia]

Sure, I understand the fear that everything and every enemy going forward is going to be explained via dynamis instead of aether because here's our new hot plot macguffin - but it's yet to be a factor in the Pandaemonion raids, and it feels like a useful additive retcon instead of subtractive.

When 7.0 comes out and all the new added skills for all of the jobs have in their tool tips dynamis instead of aether, feel free to say 'I Told You So'.

The point about new zones and areas in the map are a good one; FFXIV is generally very good about revisiting old lore and places instead of abandoning them for the new thing. Like the primals, they will often re-contextualize and add to with additive retcons, but that's in part because this is a MMO.