I just noticed that moving around constantly crouched makes the AI resort to only overhead swings. However, I feel the AI still usually hits me with lateral swings if I crouch as a response, so I don't think the AI should just be using overheads.
Yes, it's cheating. I was doing it merely to see what effect crouching would have on being able to dodge lateral swings. Thinking that maybe my timing was wrong, I decided to just walk around in crouch and noticed that the lateral swings stopped.