I’d personally would love more lovecraftian lore ant atmosphere in the game, although probably in the form of a mod.
Seeing that the “classic” mod has already been merged (up to a degree) and there’s been talk here and there about adding even more world generation options, all this would eventually be possible (I mean, even easier as it is now).
Changing all the buildings to either victorian or early XX century versions, gear, weapons and clothes to those available in those eras, and zombies to deep ones, etc shouldn’t be that hard, even now. We could have our own randomized and personalized version of Escape from Innsmouth each time we play. And that would be just for starters.
And sanity. Not the “sanity” system we have now, but a real one. Accompanied by real, painstaking, morale effects. Not yippie-happy-hey! survivors anymore, but emo realistic-pessimistic ones that curse each awakening in this nightmarish new world ruled by eldritch creatures. IMO in a mod like the one I’m imagining here (heck, even in vanilla) you should fight for your psychological survival as much as for your physical one. And both should be as lethal.
About the proposed house rules for CataDDA, well, I think it’s easier to write it than to make it happen. Apart from editing a new profession with all the starting gear you still rely on luck to find spawns of nether creatures and the like, or the places where they lurk. Stuff like this always end up being just good intentions. You try to focus your character but end being the average survivor with average gear, vehicles, weapons, etc… except maybe in your mind. But if that makes this guy a happier player, hey, more power to him.