Great looking map for starters, I see a lot of work has went into this, and while i haven't playtested the map i had just a few ideas from running around in it for a while on all classes.
1. Holymoly that sightline
2. You should playerclip these as they are integral parts of the map and they hold up movement.
3. You should probably change all Hp in this area to medium at least. There are only small HP packs on the map to my knowledge, even 2fort has better HP packs than this map (okay maybe that;s a bit too far)
4. Another piece of geometry i would like to see playerclipped, these pipes cause problems with scout movement sometimes because of the circular model effecting whether the scout is in the air and is liable to use his double jump or not.
5. You should extend these a bit maybe, scouts get caught on the door as you leave. It's not really too important though.
6. This probably has something to do with your detailing, but when i looked down here and saw the massive blinking red light, i wanted to jump down, and it seemed like it would be connected to the water area at least. Maybe making the drop more noticeably deadly would be a start.