That squiggly line near the top of the area really draws the eye towards it. Is that what you were going for?
This looks kind of weird to me mainly because it seems like you're trying to create a never before done style but can't really decide what that style is going to be, so it's a bit of a mash-up. To be honest this map embodies the swamp theme better than any other map I've seen so far, but I think you really ought to think more about how to simplify the look of things.
I'm kind of eh about elevators... isn't there anything else you can do in this situation? Maybe make a security grate door with holes in it that bullets can pass through? Something like this: http://i36.tinypic.com/15y893c.jpg
I think you should take some of the lighting from (what I assume from the blue textures) the blue spawn and use it on C. Everything just feels a bit distracting on C as it is now.
#1: The death pit is big and bright and while it draws your eye towards the capture point, it also makes the players go away a bit.
#2 The upper level is even darker with the door being really bright but the ledges themselves are dark.
#3 The point_spotlights are quite distracting. They are also a bit weird in that the lightcones are really bright, the ceiling above them isn't really lit up at all.