Got some feedback on A6 (I think it's actually supposed to be B6, but it looks like you made a typo in your update post)
Why is the side of the wood brushes in Blu's spawn textured with rock? If you want to have a "wood sitting on top of rock" feeling, put something to indicate a transition between the wood and the rock, so that the player can distinguish between the wood and the rock instead of it feeling like one abrupt transition where the wood is also rock.
White light circles with no light props to indicate there's a light there.
This chokepoint is very small and has no way to flank around it. Nasty and annoying for Blu, awesome and overpowered for Red.
Propspam.
Why are the sides of the
WATER textured with
ROCK?
In fact, why are the sides of the water visible at all? Why does the water just abruptly end? Shouldn't there be something holding the water in?
And why can I get up here? This should be clipped off.
Am I supposed to be able to get here?
This is the view that you have when you walk right out of red's spawn. Perfect view of the entire area, massive height advantage, and a really nice view of the aforementioned chokepoint. Perfect for snipers as they have an infinite supply of health and ammo nearby, not good for Blu at all.
This door is very tall, Red can stand on it, and the bottom is textured with wood.
The trigger area for this door is too big.
In fact, you seem to have a fondness for doors. Don't do that. Don't place doors everywhere, cuz then players can play peekaboo with other players and demos can easily camp almost anywhere.
This sightline is so long, I'm hitting the max render distance. Be VERY careful with sightlines that are over 3000 HU.
That bridge is incredibly thin for a bridge that's made of rock and meant to support the weight of a payload cart plus any people pushing it.
Your func_respawnroomvisualizer is invisible here.
A lot of this could be nodraw.
Why does this grate in Red's final spawn open to the skybox? Is this map meant to be really high up in the air or something?
As a demoman, I can stickyjump up and shoot stickes into Red's first spawn. That shouldn't be possible. The only way to see or shoot into an enemy team's spawn room should be through the door itself.
Another nasty chokepoint. The saws only make it worse.
That's all I got. You're improving a lot, so don't feel discouraged. Good luck with the map!