Did you add the hint brushes and do a full vis? It still looks like some areas are visible that shouldn't be when showtris is enabled. In the screenshot below, for example, the underground area should be completely cut off from just about everything, yet it still shows up, and while you're inside of it, you can see other parts of the map that are completely out of view. Try putting a hint brush in the opening, something like this:
___________
| |
| H I N T |
|_________|
| |
| |
| |
| |
| |
| |
| |
|_________|
| (water) |
|_________|
Also make sure you don't have any major structures detailed -- walls and such. I think the archways along the water are causing a lot of vis problems, too, as you can see through the whole map from there. If you closed those up a bit or added some solid structures to block the view, it would probably help things a lot.
Being nitpicky, there are still quite a few texture alignment opportunities. The light in the screenshot for example... Also, the wood grain should always go along the length of boards. You fixed the tops of some of them, but the sides are wrong, and there are a bunch of boards stacked up in the bases that have the grain going along the short side. It just looks weird. It would look better to angle the textures on the side of the ramp boards, too.
The new version is up in rotation on the beta server: paintball2://216.127.68.86:27919