The point of the culture districts is that they combine several groups into an umbrella area, instead of having a single isolated "Etosian district" that only 2 players have characters for. Neighborhoods can work (Petalcourt) but need a central unifying theme that players can leave and enter on a whim without losing activity.while I understand it's regalia and you'd prefer a city based on "human cultures" though it'd kinda suck to remove Elven / Allar district and not create a Songaskia+Qadir one.
each of the above have more active characters & players than Northland/Wildland/Warmland/Regal
And there can always been racial areas like the Polorc that exist outside the city limits. In fact I'd say the Countryside Estates work well for these experimental groups. This is the Ailor capital, and should reflect an Ailor theme. Hence the