Thanks for your suggestions I really appreciate that. Most of them I had in mind as well. However some of your suggestions are not really lore friendly when it comes to dwarves. For example as the whole city is underground with no sunlight there cannot be any farms obviously. Usually dwarves get all the food from trade. They also didn't use horses so stables would be useless. On the other hand brewery room sounds pretty good as well as a giant vault. Definitely will include these in the project.

ps the runes on the walls of the throne room look amazing: the bottom story needs some too

Of course a bit of smoothing is still ahead of me. As I don't have any plans how to build I just build spontaneously. So I am aware of that fact that caves needs to look for like a caves than as you said /brush sphere air 3. But thanks for your opinion I appreciate that. :)

Yep; I see that two - and I am not even a big user of world painer; I still make most of my caves by TNT....

But beside that I really like what I see. The drawfen builds inside like the smelter looks good and realistic - go on with it!