Fail! This topic is about AI, not map shape.
In the stream on YouTube at 1:02:45 Brad answered a question saying he is "starting up on the AI, right now I'm waiting to start up on some of the algorithms for my pacing complaints." That's all he said on the topic, but it does answer the question whether Brad is working on GC3 AI.
The OP specifically mentioned Combat AI, though. Maybe that specific question is still unanswered.