As another suggestion, toss a little random delay into
when they do anything. All it takes is 1/10th of a second here and a 1/2 second there before they turn, move, etc. to make them seem more human and less like a hive mind.
If duplication across the network is an issue then assign a random 'lag' to them on a unit by unit basis as they're created. It's only natural that you'd have some Gomer Pyles in among the Chuck Yeagers in your outfit...

This would also allow you to have units that seem to have different skill levels, when in fact it's just that some are slower to react than others.
-Av-