There is no excuse to release incomplete biome after 1 year and 10 months of waiting. The fact you can't upgrade to tier 4 is slap with a **** in the face tbh.

This biome is a lot of pretty obnoxious grind. There's is a lot of searching and chores gathering materials in Mistlands with ass terrain and ass visibility - and for all that effort, you don't even feel like you've upgraded.

At least you can bath in tons of marble without any effort - just build a stonecutter and dismantle Dvergers' structures. Got like over 2000 marble 10minutes by dismantling a single tower.