I don't usually play in attic rooms because I don't like how the walls cut away in small rooms but I don't like the wall down view either. I have no issue with viewing angle if rooms are large, so maybe this is a building design issue rather than a game design issue.
it's a roof walls touching regular walls makes them spike upwards issue. It exclusively happens where roof walls touch regular walls, as pictured. You can have a perfectly square box of a house and it'll happen if there's roofing touching any walls such as from a porch.
