I've also been thinking quite a bit about the pros and cons of dictating too much of the history in any one area. If others are going to map buildings or underground parts to this map, then I won't be doing them any favours by dictating the story for them, or unwittingly setting a scene they cannot use.

What does everyone else think about this?
I don't see a problem there, it's your section and it's always good to add flavor.

I'm not sure I understand the modifications you made on the last version. To me, the slopes on the previous one looked better. It could be like a ramp, or maybe it was shaped by people giving it sharp angles.