You obviously haven’t seen much Fyreslayers artwork:
Fyreslayers architecture is prevalent in their artwork,Mind as you can see there are stone statues aplenty.
Stone statues fit Fyreslayers because they are more archaic and can be painted to fit the black volcanic rocks that would exist all around their mountain lodges, and given they have already worked out how to use Ur-Gold runes to amplify one’s strength and endurance, it would simply require an extension of this magic to awaken something inanimate that has the Rune inserted into an appropriate carved hole. What’s more they would fit well with Fyreslayers’ playstyle of being slow but extremely durable and good in combat.
I’ve also thought of the idea of bringing back some of the more archaic Dwarf war machines reworked into Fyreslayers style, like the Flame Cannon (which would fit especially well with their lava theme), Grudge Thrower and Bolt Thrower, especially as GW have got rid of most of the Dispossessed artillery now to fit their horrible vision of Cities of Sigmar, as Fyreslayers are a slow army and static artillery would fit their style of play better than Kharadron who prefer guns mounted on their fast-moving airships.
In conclusion are plenty of other ideas that can be implemented for Fyreslayers if GW are imaginative enough and give them a chance, which they should because they’re awesome.