Ugh no. I think we’re at the point of peak saturation with far-east stuff and any more would be too much. Doma/Hingashi already took up 2/3 of an expansion with story content that could’ve been spent building up the city that we’ve known about for 6+ years. The aesthetic already has a city, housing zone, and 2 classes already. I’d rather something more unique than “Kugane, but not”.
I think a good unique zone they could do for 6.0 is an entire ruined city is the zone, like Chamba from Breath of Fire IV. Miasma/mist fills the city except for a few pockets and it’s filled with monsters and you need to travel rooftop-to-rooftop or in the sewers. The hrothgar city destroyed by meteor would be perfect for this.