The two likely exceptions for that feeling are: if you plan on using them in a grundstock escort wing for shooting/screening exclusively, or if you plan on running Barak Zon, which he is doing. Nothing stopping you from doing both, but I'm still not totally convinced of their usefulness even under those circumstances (although I do like the idea of spear and speargun wielding balloon dwarfs).
On an unrelated note: this is my first post, and first army, so since I haven't played any games, it’s all theory hammer. These are the only two models I have painted so far, but plan on finishing Aether War and 2 SCs. Let me know if there is anything else you would do or clean up since I haven't painted much before.
I'm also wondering if anybody has considered running the ultimate surprise/fun build of 5 endrinmasters in an ironclad with the ram endrinwork and a skyhook, with rigger escort, and healing nearly to full every turn while smashing stuff with dangling hammers from the side of the boat.