its kind of annoying to have to build more that one altar and to only be able to make single sacrifices.
how about an option to have a mass sacrifice?
Multiple altars are intentional. Tradeoffs and all that.
Auto-sacrifice has been done and languishes in dev hell.
Mass sacrifice is not terribly attractive, since there's no good way to indicate which maidens you
don't want to sacrifice. Well, I
could add a 'sacrifice her' flag, but it will still mean you have to click on the gal at least once in whatever UI that would get set up for that. I don't think clicking 'altar', 'sacrifice' and CTRL-ing through the event is all that much slower.
Edit: On reflection, perhaps I
could set up a multi-selection. But it's a lot of bother for what's ultimately a rather small improvement, because auto-sacrifice will take care of seals, and how many sparks are you going to need?