I still dream of a DLC for Rogue Trader which’d have us help Yrliet investigate stuff on one of their Craftworlds… I loved how humanely they portrayed the Children of Asuryan in the game, I think there’s a lot of potential storytelling there.

Edit: would totally like to see some Gue’vesa related character drama, too, would really make for a wonderfully cheesy romance B-quest! The interaction between forbidden romance and pure 40k Grimdark would surely lead to some interesting situations! T’au aren’t my favourites, but even I can’t say no to those Battle Suits!

Edit 2: Uuu, you could play it off having to decide between allowing, then sheltering the romance between one of your crew and a T’au dissident, get some mini-Farsight action! Might even have to team up with Caste T’au to “root out the infiltrators” while going Dogmatic, and, like… use their bones to craft Riddick stabby stuff with Chaos rituals for Heretics, I dunno what they usually get up to…