This map has some really cool ideas. It also has some really strange ones. I think you'll find that your yard areas from the second point to the middle point are too long and empty and don't accomplish much, while the rest of the map is pretty cramped in general. I like what you've done with the second point area itself, but I feel that the areas leading up to it won't play very well - too hard to get a flanking approach onto the point because of the cramped indoor spaces and the long open outdoor ones.
Here are some pictures too.
^You might want to add another light in this corner to give the water something to reflect, it looks really weird like this.
^This hallway is simply too long and narrow. It will be impossible for anything to go through here for fear of soldiers, demomen, or snipers.
^Your stairs are really steep, and it hurts! If you spread out the room a little it will leave room for stairs of a more reasonable slope and will also help it feel less cramped.