So...I really like how this looks. I'm thinking geometry-wise, this probably plays pretty well but I haven't actually played it yet so no comments there.
Some generic stuff that you are probably already aware of -
You have a few big no-draw spots:
http://i.imgur.com/e0T7wxH.jpg
http://i.imgur.com/Hy82efW.jpg
http://i.imgur.com/ibEQIvZ.jpg
This small gap outside spawn on stage 1 (both red+blu):
http://i.imgur.com/rbaESQS.jpg
Got stuck - first stage just above the point area:
http://i.imgur.com/5NmKdJh.jpg
Brush on brush action:
http://i.imgur.com/7OJuuaX.jpg
A few, possibly, nitpicky things with the second point...
The pipes here:
http://i.imgur.com/CGiZH6K.jpg
I really like this, very cool and probably some fun times with scout/spy/pyro. What I don't like about it is that the little ledge underneath, is only on 1 side. I would duplicate it or extend it and then move the pipes out a bit more. On my roll out I could get there and jump up/over the point from there quite easily and only one team having that ability probably doesn't work too well.
This ledge:
http://i.imgur.com/lBnkZAl.jpg
Again, I like the idea. This could be a good spot for ambushes. You can however walk around to the edge of it and it appears as if you can get on top of the point, it's clipped off though. I'd make it more obvious you can't get on there, I really wanted to once I saw it.
The opposite ledge:
http://i.imgur.com/TbCivTd.jpg
Different issue on this side, the spot is way better! Because the door way to the point is right there, this spot is far more likely to actually get you some kills. The other side is really just an ambush for the lower path but not the point itself.
I don't know how or if you can even balance the two spots right now but I think this side is much better. That being said I haven't played it yet and I was able to roll out faster on the Blu side - so it could be balanced as is but I thought it was worth mentioning.
I'm pretty tired right now so I hope this all makes sense. Excited to see you develop this, it's pretty cool and I really want to see it polished.