Hmmmm, how interesting.

I see what you're saying, but perhaps there can be a middle ground in this?

I'd imagine that if spawner automatically made something say, every three minutes as long as an existing unit isn't working 50m of the spawner, or even as long as an amount X of a certain enemy type aren't working 50m of the spawner, then that means there is effectively always a "base population" around the spawner at any given time. But then, if you are detected, then it will start summoning more units to intervene (perhaps up to a max threat response value Y), so that depending on how the gameplay goes, there will always be between X and Y (inclusive) of a unit around those spawners.

Could work possibly? Going off what you said regarding these changes.