Just a vague idea, but I thought it'd be neat if they maybe added an extra subdivision onto wards that had a different look and layout, and was a unique theme related to the region of each housing district.

Lavender Beds: A new section of neighborhood themed around the Sylphlands, with Sylph houses dotted around.

Mist: A pirate cove with Sahagin-based theme + giant coral reefs, etc.

The Goblet: Maybe a section of neighborhood more Sil'dih-themed, honoring its memory and including Amalj'aa presence. (Relevant to Sil'dihn Subterrane variant dungeon)

Shirogane: A new section that's underwater, using the same "underwater bubble" system that Sui-no-Sato and the Kojin settlement use.

Empyreum: A section higher up based on the Sea of Clouds, with floating sky islands.