Au ra got a ton of lore throughout Stormblood
Hrothgar is about to get a huge lore dump in 5.3 and already got a lot in patch 5.2
Viera on the other hand seem to be the ones who will get no kind of lore going into the future. There's no way we're getting a Golmore Jungle zone after we already got Ratika in the First.
What do you think they will do? Put all their lore in the new lore book?
What we got from the Dramaturge is just very very basic physical details and how they live. There's no real in game representation of it.
PS. Viis don't really count, their whole lore is wrapped around the Ronkan culture. Ronkan pyramids, Ronkan magics all over their forest, Ronkan fashion, architecture, etc.