more stupid ideas: sound propagation and stealth kills.
the idea is that the monsters should be attracted by the sound of battle. the sound should propagate with some floodfill algorithm, not with simple range checks. this way, fighting in a room with all doors closed will muffle the sound, so less monsters will hear it.
also, this opens the way to stealth kills. if PC will use a dagger, for example, and kill somebody in a closed room without windows, and there are no other team members inside, and it was insta-kill — other team members will not turn hostile. i.e. nobody heard anything, nobody seen anything, no reason for hostility. this might be a special kind of attack with increased crit chance, but with heavier retallation too. not very useful mechanic as of now, but could be useful for new quests.
just to make myself clear: i am throwing ideas here, but i don't know when, or even if they will be implemented. most of them are in issue tracker, so i can choose some idea to work on if i feel it. also, i want to get some feedback on the ideas too. of course, it is hard to say something without a way of trying the thing in the game, but… you might spot see something i missed (like hiccups effect for praying, for example), or suggest some way to improve things. it is about 7 or so active people here, i believe, and this is the ideal number for such kind of development.