We need more Housing Wards!

[Enkidoh]

I think 2.3 is adding a 6th ward to each of the housing zones.

That's correct - SE confirmed a new 6th Ward is being added in 2.3 earlier in the month found here:

Greetings,

In patch 2.3 we will be adding the following new wards:

• The Mist, Ward 6
• Lavender Beds, Ward 6
• The Goblet, Ward 6

We’ll be making adjustments to the prices of plots for each world right up until the patch, and we will make a follow-up with this information at a later time.

So there you have it, straight from SE.