Tested it out and here are my thoughts.
Needs more signage. It is kinda hard to tell which point is which. Or how to get to the points. Though it does become a bit more clear the more one plays, although some color differentiation in textures would also be helpful since the map seems to work in a circle.
For the ramp leading off of the start boat, it is kinda annoying to have to jump up to that, maybe adding a little ramp or stairs up to it?
It definitely feels a little bit on the large side, although I do like how quickly demo men and soldiers can get around.
I think that the center ship has a few too many verticle layers, they don't seem to really add anything to it to have 2-3 lower levels as alternative paths, it just adds extra space.
I think the final and second to final cap points need to cap much faster. It should hardly take any time for the last point, and median between that and the center point for the second to last.
Your top skybox is too low, I can stand on top of the center ship as a demo man and hit the top with the pipe bombs and watch them bounce off. Also it is kinda frustrating as a demo to jump and fail to make it to the ship cause I clip the top of the map and am knocked down.
I hope that helps, and I look forward to seeing future releases.