> acting unpredictably from time to time can disorient the enemy commander, expand their loop and therefore allow you to act at a faster tempo than he

I disagree that this is a good idea. I think acting unpredictably gives your opponent a reason to look deeper into your strategy which ultimately might end up sinking it. If you perform an unpredictable move it should be for a hard and fast strategic gain.

Ideally you should move in a fashion that is entirely predictable by your opponent without incurring significant loss to yourself. This will caused them to be surprised when you eventually break from your predictable normal activities and perform an unexpected maneuver.