Yes, I have.

I'm imagining an AI war where the next advancement is the micro of the siege engines to optimise targets and timing of shots to hit large groups after the initial splash avoidance. AI on both sides keep trying to maintain a one-step-ahead strategy which minimises/maximises casualties based on predicting the exact shooting/dodging strategy of the opponents. Will be interesting to follow developments in this area!

That's a rules engine, designed to do basically one specific thing. It was told how to micro. In that context APM is a meaningless constraint. May as well ask how many times you can print a message in a for-loop per second. yes...quite a lot, and the computer is unfazed by the workload.

This is a different type of bot we're talking about here. A neural net could not learn to work with unlimited apm more easily than limited apm. That just doesn't make sense. That's like saying it's easier to compute 1000 hashes in a second than it is to compute one hash in a second.