We need to play this a lot more so everyone figures out the layout and how to play it; I've played it 3 times total in the last 2 months I think (when we first played it on custom night). Everytime I play it it's been really really close games, with last second ubers and counterubers and overtime and BLEAK KILLING MY UBER MEDIC.
I'll admit, I don't like the spawn camping that happens because the spawns are so close, but like I said in the custom map night thread, all they have to do is make one of the dropdowns go all the way to the 2nd basement level and it'll be fine. Remember everyone can jump over the office partitions near the spawn if you get on the tables first; soldiers use this to shoot the pyro hiding on the other side of the wall and get down to the 2nd level.
I'd also definitely like to see some more varied terrain on the bottom floor true you have the stairs and the vent and the platform on one side, but it would be awesome to have some more cover for sentries or places to hide, cause right now the point itself is just on a wide open space of flat ground.
To attack the easiest way is to get one team near the stairs next to the point, an uber dropping out of the vents (there are 2 entrances to the vents from the 2nd level), and soldiers spamming rockets (now with kritz! i sound like a lolcat everytime i say that) at any sentries near the point or away from the point from the opposite side of the room.
To defend, get the heavy and a sentry next to the point, half the team defends on the point while the other half goes upstairs to hold off the other team. Remember to clear out the vents from all 3 entries, or spam pyro flame/demo bombs through the exit and the vent grating (flame can go through the vent wall, dunno if that was intended or not). Can't leave the point without a counteruber ready, but can't let them camp the spawn either (like castle!). Lots of flanking possibilities in the 2nd floor, plus you get the occasional hiding in the toilets.
Pyros have to keep flanking and clearing out the 2nd floor/vents, heavies need to be a minisentry to watch backs and protect the team on attack (move together!), sit near the point for a counter for defense, soldiers need to spam those rockets from across the room where guns and heavies can't touch you. demos get on the stairs and vents and spam away! Of course you can play any style that fits you, but these are my observations that seem to work from my limited time playing.
Remember the 2nd floor is circular with 2 entries/exits to the top/bottom floor so it's very very easy to get flanked down there. A heavy dropping out of the vents can wreak havoc when no one's paying attention; even without an uber I dropped down and no one was looking at me as a heavy until I tore them up. The gun was down already because a soldier across the room had taken it down w/ rocket spam. I remember one game santa was sitting in the vents camping the point and none of us defending went to flush him out; it's really important on defense to keep that vent clean.
I like the concept, and it's better than that other king of the hill map out there (RAINBOW!!!). Or not. Depends on your current level of inebriation and number of questionable substances consumed.
