Very interesting idea, and I'm glad this idea was made at all.

I can't guarantee I can do much other than music, lighting, and scripting, unfortunately. :/ I have a few original maps, but I feel they are mediocre, not to mention among the unimportant props are ripped content (Halo Grunts).

I can submit a version without e ripped content, though, just for your own input.
All this talk does remind me: are mappers permitted to make changes for maps by someone else, with the other person's permission? Not only would I like to change lights most likely (it's my favorite part of mapping), but I also encourage other mappers to find ways to improve my own levels.