I was only in there for a few minutes today but I remember playing this map earlier.
1. People seem confused about what's behind the door that hides the point. Everybody runs up there and is like "omg what is this" and doesn't get the idea of defending it. You could try making the door partially glass or something, so people can see the point from the beginning. You could even make there be like... 3 layers of doors. The outer is solid with window holes, the second mesh, the third glass. Have the outer start opening slowly, cp_steel-style, as soon as the round starts... then the second layer, then the third opens the moment the point is available to capture. That way people know the point is inside, AND that the door will eventually open.
2. Get rid of the electrified water. To me as a player, nothing is more annoying than some kind of random death scenario I can accidentally back into while learning or playing the map. When that happens to me, I instantly like the map less.