I know I saw a post a while back requesting this, but I couldn't find it anywhere while scanning the official list of suggestions.
I would just like to suggest again, for at least 45 degree rotation of building and walls, it would give us architects a lot more options, and would make it easier for us to follow the natural lay of the land. Also it would help add to variation between tribes.
I no nothing about programing at all, but If we can rotate by 90* I'm guessing it can't be too hard to add a little more rotation options.
Oh, and it would be great if it was implemented sooner rather than later, not to be pushy or anything. Just so tribes have more options before the general layout of the tribes are decided. (or re-decided in this case)