I was wondering what are the ways that you can find workers in your unavailable workers pool area, other than if you have just purchased them, or if they are used for repair when playing terran.
I noticed that the diagram on the unavailable workers pool shows a worker building. Wouldn't it be more interesting if there was a rule saying that whenever you build a building or a module, you should put one worker in your unavailable pool?
The only problem with that is the limited number of overall workers that you have, and in mid-to-end game you need all the workers you can put your hands on...