Just going by the screenshots alone this is more like pre-alpha, nowhere near release candidate level as you've (at this time of writing) stated in your post(thats like after Beta, very final in its stage).
It doesn't really look believable. I know TF2 is not really a realistic game, but who builds a tower with half of it made of bricks, and the other half of wood in such a split way? No building in tf2 ever does this. You should consider the control point building sort of 'No Man's Land', a structure that doesn't belong to either team, and decorate it as such.
Its very late at night for me at the moment and I was effectively passing by but I might at least download the map and give it a look tomorrow to give you some proper feedback on the layout, but going by the screen cap it looks like it would be a pain in the ass to get up to the top; explosives, AB and the FAN are going to be very effective on this map while the other classes might find it frustrating to play. It would appear that there are two entrances to the tower, since both are from below the defenders have a height advantage: I can imagine that if a Demo and a Heavy were to cap the point, it would be fairly easy to keep hold of it, and add an engineer with buildings and capping for the enemy team will be very difficult without relying on an uber. That uber may be difficult to use due to the long and risky climb up to the point, with the large choice of knockdown tools mentioned above may make the point too easy to defend. Granted, its only 9 a side rather than 12 or even 16 players a team, but I fear that the current layout does not look like its doing you many favours.
Thats merely what I can gather from 2 screencaps, but if that is an accurate description of what it is like to play, you will need to revise the layout. More entrances: even Arena Watchtower, whilst not a KOTH map has 6 entrances (North and South stairs, East and West Pipes, and two top holes on the roof) to the enclosed tower. Even if the layout is feasible, its certainly not decorated like a release candidate map.
