It sounds like a really fun map to play on, but it is lacking in a few areas. It is a simple and fun concept but I don't see it lasting a long time.
Working alone is always better in my opinion, because if you want to improve something you would have to run it by everyone else before improving it.
carbine placement on maps and the ability to add simple triggers.(player A goes into hill 1 item spawns) I think a lot of cool stuff could be...