At a guess, and not to speak for others, but not every one who reads the request posts feel that they are up to the particular challenge. With a quick look at the list of people who have looked at the request (not knowing if they actually read it) there are at least 3-4 who COULD handle this, but some times it is a question of a requested style that someone doesn't do or feels comfortable trying. It could even be that those capable do not have the TIME to devote to the request due to prior commitments.

In my opinion, you are asking for some complex technical drawings, in a style not really compatible (if you are referring to the Tech Complex map) with such drawing. If you can find some examples of building maps that you want the style to be like, I think that it might help clarify that confusion.

I wish you luck with this project, and I hope you DO find someone up to the challenge.