Probably going to repeat a few things that have already been said, but here we go.
I would make this a mini ramp just to connect it cleaner. Cut the metal platform off where the brick pillar sticks out, and (mini)ramp it down from there to the doorway.
Just get rid of this part, and make the wooden brush brickwork instead. The resupply does not need to be there, just bring it forward.
They both go to A, but they look like they have completely different access to the point. Which one is the main, which one is quickest? It's not exactly clear, but I would assume most people took the left as it's the closest.
Already said, but this. What is this meant to be?! Get rid of it or make it something purposeful! It's not even very accessible right now.
lol. Just.... what Ravidge said.
FAR too many signs, not a pretty sight. You should not have to rely on signs for a player to know where to go - they are just an aid.
This door is huge! I think it could do with some scaling down.
Okay so, dropping down from red's spawn thing. FOUR DOORS. One doesn't even open at the start, but you can't tell that from looking. Avoid crossroads like this. Maximum entrances/exits should be 3! Dropping down in to the middle of a cross junction like that is not nice either.
Okay, so here's what I would do if it was my map:
Red is the current, that I feel is bad. The light blue indicates the new building (with a poorly illustrated ledge), with the arrows showing the possible routes. The limey part is stairs, getting rid of that dead end part underneath.
Again, what I would do. Take it or leave it, up to you.
Red = scrap/out of bounds.
I moved blu spawn over to the right in to that building. The area to the south really doesn't have much use, as blu can exit north and bypass any defence red has there. The limey box is meant to be a new building, with the point on the upper level, in comparison to the current level of the point. Outside of that limey building, I would have EVERYTHING south of it outside, rather than making it a map of winding corridors, and if need be separating it up with smaller buildings.