Interesting map that - I think you've posted it somewhere in its original form (CMMmapTerra-ALPHA.unr ?) for people to 'play around' with it. I've added a few ambient sounds; some gulls, geese and song birds; and some pathnodes so I can play MonsterSpawn in it and it works fine for that - I was going to add more vegetation but haven't got around to that.
As you'll be aware, movement around the map is varied - some parts can be accessed fine whilst others have poor connectivity. Given the size of the map and its general openness, the sniper rifle (or, at least, an assault rifle with a zoom) is an important weapon. With the proximity of the ocean and the nature of the terrain (and the intriguing built structures), it's the kind of map in which one can be quite inventive with ambient sounds and with some kind of fuana and so create a nice sense of a unique place (a home for the flappy family perhaps?).
It will be interesting to see what you come up with eventually