Ran through it and here are my initial thoughts:
1. The map doesnt end when the timer runs out, figure out why this happens and fix it to avoid rage on gameday.
2. The pipes going across the final point area are very difficult to jump onto because of the sloped sides, you might want to consider placing a flat clip over them to make them a more legitimate route. But I'm a bad scout so this might not be a problem for others.
3. The railings in the downstairs area connecting the first and second points dont block players, you walk "up" them as if they were stairs.
4. That same room, the stairwell nearby, and several other rooms are too dark.
5. VERY long sightlines all around mid.
6. The large number of different textures (including those ugly concrete walls that aren't aligned to each other) around the mid point is very very odd looking. I would recommend cleaning that up so it looks nicer for alpha testing.
7. Make it clear that the canopy by mid is clipped. It looks like it should be accessible from the nearby brick ledge. You should also block off the hole in the map under the canopy or at least make it so you cannot see the rest of the map from it.
8. Don't put CPs on transparent materials if you can see them from below. The CP model has no bottom and it looks bad. You did this on mid point.
I'm not a fan of 5CP, but this looks fun. Looking forward to seeing how it plays