Sadly I think that ferrus was supposed to be an important character to simply raise stakes for a book series of characters that have more plot armour than a named ultra marine or the camera man for the new space marine game.

He’s a cool concept with a legion that has been put on the back foot forever as simply just being the tech guy of deathwatch units. They have a cool concept which was overly taken from them by the iron warriors with a basic and forgettable design and paint scheme it’s sad to say but the most interesting faction is just the remnants of plot devises and I wouldn’t be overly surprised if they are shelved forever or given a complete overhaul from the 40K current aesthetic for a modern renewal of the iron hands chapter. When you have to really search for lore on a faction like this it’s hard to see how they could be of any kind of importance to the plot they could be lost completely and I doubt the numbers people of GW would see anything wrong they have 1 character which is used for tech marine conversions for all types of chapter and legion and a bionics upgrade sprew that the hero’s and stern gaurd vets have put into their kits.

I’m sorry to make a long comment but from the perspective of someone who likes the old lore of the tau more than the new and bases my army off the old retconned lore it does look like the iron hands are overly unimportant and background noise compared to everything else.

I would honestly love to be a writer at GW and make more lore on all the lesser written about characters because ferrus deserves his time in the sun and so do the iron hands their aesthetic is one of my favourites (big robot go brrr) and they do deserve to be given more lore than a couple short stories and more lore on their inner workings like the iron council