I doubt I'll be able to express so many nuances on rather small icons, but we'll see :)
Well, actually those icons are (fantastic and) huge: i mean, while they are very clean and with minimum detail expressed, they are big enough to be useful to describe very different kind of buildings. Of course, I know it's a big work: you'll need to build "church" type buildings, "tent" type ones, "ruined" ones, "surrounded by walls", "castles" types etc.
However, in the meantime we can dream 💜