A new map in town, but not a single answer until now. There were better times.
As I mentioned before in the "WIP" thread: Really nice skybox. In the first moment I was thinking, maybe it might be possible to change the render mode of the whitely-looking trees in the background to pitch black. I believe it might be improve the look of your scene.
Anyway, in test mode it looks like the "lobby player" (info_player_commons) have direct access to the playable map (the house). Should this be so?
I'm not the big fan of "defend for xxx minutes" maps, but if I see your map in the wild, I will join for a ride.