I've been thinking the same about my own map suggestion (Toxic Tower) lately, but I'm sure that the respective mappers are simply taking a break. The mapping process probably becomes monotonous and dull with prolonged implementation.
I just want to add here that I'm not dead nor have this mapping stopped, its merely at the point where I'm just going back and forth with trying to get lighting in a nice shape in the small amount of corridors that I have. When that's done, I can just copypaste everything and have 80% of the map done at the same time.
I decided to try to ignore my OCD and complete the shape of the map directly instead. So here's how it looks now. Be aware that this is ABSOLUTELY not any final pictures, detail will be added and I will most certainly replace the water texture. Currently the water is in "fight" mode. If anybody wants to test, ask me and we'll get goin.
Thanks for the feedback I believe if I understand correctly it's just a rough draft of the 'full' map that @Donkie got together before polishing.
If I wasn't so damn busy all the time I would make one, the reason that the other ones I attempted didn't work is because they weren't my ideas, therefore I wasn't really able to grasp the feeling of them. If I have time to make another map, It will be fantastic. Donkie has a really good map going here, I recommend you guys let him do it at his own speed though, unless you want sloppiness.