Really? I could have sworn there were 2 default maps that had the .map shipped with them.
Also, about the ATCS pics you posted a few posts back, what brightness were those taken at? The alien base foyer picture (the last picture) looks really dark, and it might be a bit rough on the eyes or hard to see. I could just be completely wrong and it just looks that way because it's pictures on a forum rather than in-game for me personally, but it might be something to think.
I'm not going to argue that ATCS is the best default map, but there is absolutely no way to validly argue that Uncreation is better than ATCS in terms of gameplay, which is the most important part of any map.
In the coming days/weeks, I'll try to get up some dev shots of the super secret map I've been working on. I haven't even talked about it on the forum at all, so only a handful of people know about it. I've got a couple hallways to connect, texturing to complete, and detailing to do (including all of the lighting) but I'll try and push it out by the end of the month.