I'll try to explain myself for some of these things you guys mention.
First off, the lighting: This was a nighttime map, and my first one at that. I didn't want to jeapordize the natural shadows cast by the skylight I put in, and so I went stingy on other atmosphere lights. Honestly I don't know how to improve the lighting without tinkering with the ambient level (which I did, and it's at 70 now. I may try 20 as you suggested but that would make the map darker, which others criticize the map for now).
The texturing: Yeah, I will improve that a bit. I don't want the map to be too gimicky and random though, and that's why I kept it simple where possible, and detailed only when necessary: I detailed the walls that are immediate to the player, while keeping large, tall walls simple. I will continue to work on them though, as I agree they could use work.
The yellow/blue color scheme was my attempt to stray from the standard red/blue one. You see a lot of maps with one side blue, the other red. So that's why I used yellow. I may tinker with the color to make it orange-ish, but personally I prefer yellow/blue as it's different :P
The water I will definitely improve. I neglected to change the technical details of the water. In fact I believe I copied the .cfg settings for water from core_transfer, since it has green-ish water. I may be wrong, but either way that's something I'll work out.
I'll fix the license too. Again, it was copied from core_transfer.. So clearly I have to fix it in two places :P
And finally the details.. I plan to improve that but the map size is already pretty big so I don't know how it can afford to be more detailed. I play of a pretty strong computer and it runs absolutely fine, but on people with lower-end computers I think this map already pushes it.
The problem is that I've been working on this map for so long it's become what I envisioned, and I can't see it in any other way. I will have to delete entire areas and start from scratch to make them better. I just need a break from this map though lol.
Soo I have a lot to improve, evidently. I'll get on it. Thanks for the posts thus far, and I hope to hear criticisms from others (lookin at you, Quin!)