In early alphas, buildings used to have a visible zone on the ground to show the area that had to be clear or you couldn’t build. Unfortunately, it wasn’t very good and couldn’t handle L-shaped buildings and donut-shaped buildings and such-like. I think they removed it until they have time to do a better job, but I can’t be sure.
I think they may have fixed the bug with hearthings heads in the wrong spot, but that patch hasn’t been released yet. It’s certainly been reported and acknowledged.
The goblins fire (otherwise known as the Hypnotic Campfire)? I’m pretty sure they know about that. They actually “fixed” one bug related to it already. If you stole the goblins fire, your footmen would go insane and kill each other.
Good information about the fence stuff with roads! I’m guessing your workers must all be busy too. I tried it, but I had too many workers free, so they placed the furniture at the same time they were digging the foundation of the road.