I actually don't want them to be Dawi but 40k. There already Squats within the Imperium and for other Dwarf tropes Votann in general.
I much rather have them go full into the pottery and Guard affinity. I want them to be, what Iron Warriors would have become if Perturabo didn't allow the spite and bitternes to consume him and was more social and better understanding of other people. I want them to be craftsmen and artists, poet-warriors, not just grumpy alcoholics with facial hair obsession.
Of all the Primarchs Perty chose Ferrus? For someone so smart he sure makes some dumb decisions.
That's the result of his social problem. He's very much neurodivergent and just doesn't understand people in canon.
I remember that in "
Magnus the Red: Master of Prospero" the titular best boy, mentions situation where he mentioned concept of a machine that could allow navigation in the warp without Navigator, to Perturabo. Perturabo was like "challenge accepted" he made the machine, only to destroy it and refuse to recreate it, let alone spread across the Imperium.
The reasoning of Perturabo was that, he needed to dwell into the nature of the Immaterium to design and create said machine, and it was unpleasant to said the least. This way, Perturabo wanted to teach Magnus that some knowledge isn't worth having and that's better for his brother to study with temperamence and not just dwell deeper and deeper and more and more into the Warp.
But because of his lack of basic understanding of people, all Magnus got from it, was that Perturabo was a dick, who either didn't want to confess that he failed at creating the machine or just wanted to spite him for the sake of it by succeeding at it and then destroying it.
Perturabo just flat out can't explain himself to people and neither can he understand them. That's why he became so bitter in canon and his default reaction to everything was being unsatisfied no matter what he did, that's why he turned his Legion into such death machine that loses so many Marines for no reason, he wanted to find vindication for his feelings, so he made his own problems on purpose to blame on others.
