According to feedback, the primary issue with this map is that it's too fast. The route to the enemy base is so short that people were routinely grabbing the intelligence before the defenses could even arrive, let alone set up. Which, as far as CTF problems go, is kind of like being told your cholesterol is too low. Another issue was that players felt inclined to turn right out of spawn, which was the wrong way. I can solve both of these issues by simply relocating the bulk of the bases to the outer buildings rather than the ones in the middle. This also gives me a lot more freedom in designing and redesigning the bases' layouts, which I suspect I will appreciate a lot by the time this map gets finished.
And finally, there's the fact that the layout is way too confusing in general. How confusing? During the test, I managed to get mixed up and take the enemy intel back into their own base myself! The obvious culprits are the sewer and the loopback stairwell, which look like they lead to the completely opposite base than they actually do. Less obvious but arguably more problematic is that overlook above the tunnel, which provides easy access to the street that players have little reason to ever be on. Not sure what to do about that besides raising the barrier so players have to crouch-jump to get onto it and are discouraged from trying to get down there.
At any rate, the stairwell is gone, and in its place is an alleyway that will eventually lead into the enemy base. The sewer, I don't know what to do with yet. I'm kicking around the idea of adding subway tunnels somewhere, since we have subway trains to play with now (Red Line and Blue Line, anyone?), but with all the height variation in this map, I'm not sure they would fit anywhere. Between these major changes and the fact that I wanted to make the streets a more realistic width, I decided to just rebuild the whole thing from scratch. The basic shape of the map hasn't changed; I like those winding streets too much to mess with them. If anyone has any ideas, I'd love to hear them.