An interesting idea, but:
1. Overall progression between tiers isn't natural at all. Central house just becomes bigger at T2, and then smaller again at T3, but with second floor.
2. Towers without wall?
3. Not sure about stone coloration, it's too acid-purple. Look at
this color scheme, for example.
4. No Void manifestations - like portals, floating platforms/stones etc?
Nevertheless, I must admit that making Void elf architecture is a challenge because Blizzard gave us almost zero references except armor sets and bits of Aberrus. At least, until next WoW expansion drops.