Okay, I'monna have to revert the icons now. I can totally see the folly of my vision now! Or maybe its just that I'm too easily swayed by people's opinions... Or maybe I'm just a bit neurotic with this map... Anyway, I think I'll try something a little... different. We'll see.

@Andartar
The original look of the asteroid field had the docks on the edge of the field, which is arguably a strategically advantageous position, since it limits the directions from which the docks can be attacked. I wasn't quite satisfied with the look of the asteroid field, so I redid it and the docks ended up inside the field. I have removed a part of the field now, so it should be clear that the bases are actually entrenched within "pockets" (likely man-made), inside the field.