Apparently crafting seems to be a focus anyway now so the hall of brothers could complement it / no need for it.
But other than that, I feel the hall of brother would be a great place to retire your high lvl surviving early game recruits, instead of sackin/sacrificing them in the mid-late game. As said earlier, a position for your Historian/Robber/Retired soldier/Swordmaster to provide leads/information/missions passively in the world.
Maybe a high lvl historian could take a position in some kind of NPC run fortress (in the archives) and provide a event for a small artifact quest at a later date. The higher level the historian you retire to such a building, the sooner the quest would trigger for example.
