Kero, the reason why the n is left on the end is the same reason why you want it taken off...
If it were called Circum, it just wouldn't be as cool. If it were called Circumnavigate, it also wouldn't be as cool. Circumn is a nice balance between the two, and I think adds a small element of mystery to the nature of the area.
I am not sure about adding in those extended platforms again - I am actually quite interested in making it look how it used to a year ago, which was like this:
Damn, well I can't post it due to not having enough posts yet. Copy the line below into your browser:
http://img245.imageshack.us/my.php?image=09vi6.jpg
There is no pit beneath the walkway there, so if it were blocked off it'd have to be through some other means, like a door.
Another problem with blocking off that path from the marine side is that aliens starting in Angels Grave get an extra node that is very close.
Quite possibly, the best solution could be to remove the path I added to Imine Falls, and extend the route through Circumn slightly. How does that sound?