I know its a stupid idea, i was watching replays, and there were zerglings that were kinda spread out as if they were in formation(no formations in sc1), and they were moving like that for a while going back and forth, and i just zoned out and thought of this. And yeah i know its going to ruin the game if its implimented.
I think if you took out the parts that include "random" and "multiple clicks" you'd have something. With the Protoss, having low psi make them warp out seems odd, they're not mercenaries or anything, they're warriors. Low psi would just cause any psi-dependent systems to go offline, many units would shut down or lose mobility. Maybe you would lose direct control over them, but unlike with the Zerg, they wouldn't start attacking things, they would just attempt to follow the nearest friendly unit. I've actually played games that do stuff like this, it can work, but I am not sure I'd be happy to see it in SC2.