Still a fair bit of work to go yet but A13 is on the way
After tearning the map to pieces, I've rebuilt out from last to mid. I moved the last point a lot closer, in turn sacrificing yard and watchtower. Still working on the connectors there, but rough estimates take the travel time to mid down from 28s to 18.
I've rebuilt this area with the idea that the attackers are coming from the left side, rather than trying to force them from the front without limiting their flanks. I've incorporated room 04 into the main arena space, giving myself more area to work with. I've also moved defenders spawn back a little bit and broke sightlines between them and the point. I'm also trying to give Engies some sentry spots akin to Badwater Last. Powerful but hard to escape from.
Interestingly, I haven't quite turned the map from a W into a linear one, and even managed to keep the rocket lined up with the final point. My only concern is that defenders leaving spawn will get whiplash making a sharp turn once they leave the control centre.