A few things I noted:
a) The one triangle at the top of this JP is sightly misaligned, in the screenshot it looks OK at this resolution, but in-game it is noticable.
b) One combination of textures that looked strangely flat to me was one of the walls in the bases wall (see purple). The main column in the corner is flush with the rest of the wall with the red light. Personally I would indent the wall slightly (4-8u).
d) is the same wall.
c) The angled roof texture is slightly offset, I noted this on a few other roofs. You might want to double-check all of them to be sure.
d) Like in
b), I would sightly indent the wall to make the "column texture" in the corner stand out more. In other cases with different textures all of them in the same plane, that was fine.
e) In the corner of your bases there is some grass/rock geometry that is too dark, and looks weird. You might want to vertex tweak those a bit.
f) In the main area, going into a base upper walk (you probably know the location), there is an edge (purple) between a carved ceiling and rock... the straight edge looks weird, IMO, because natural rock would never match such an edge perfectly. My suggestion, place some decorative trim over the whole area, burying the purple edge. The transition between ceiling-rock would then then be more plausible.
g) Nice flags, but the very wide flag looks... ahm too wide... the flag is technically vertically quashed. This is especially noticeable since in the rest of the base all the flags actually seem to be too narrow.
- The underwater areas are nice now... the sand looks good, you might add a bit more deco though.
- Not sure about this, IIRC, most CTF pretty much dumb down the pathing by adding coloured arrows all over the place. You might want to consider this as well. But at least in the underwater areas you might like to add some sort of direction indicator to the bases.
- I like the splash of your central waterfalls and the broken stepping stones there. But when seen from the side the waterfalls are just a bent patches with no thickness. To "fix" this you might like to bend the edges of the waterfall patch slightly, might need more patch elements to do that though. That way the water falling would have some thickness.
- Spoiled from the main area waterfall, I was expecting to see something where the waterfalls hit water in the bases (around the flags) as well. Maybe add some water effect here as well?
Just some things I noted, many things are not really required, but might add that extra spiff and consistency to the already very beautiful map.
Hope that helps.