Mechanically slowing down the rate at which teleporters can be used

[Cal]

Seems fine to me. One caveat I'd suggest is these downsides only applying if they're on a different z-level, so they can trial and error quickly on-station themselves.

However this could make it difficult for newer scientists to play around and learn, since waiting for a cooldown because they're trying to learn coordinates is unintuitive.

Telecrystals have basically no other use, could be fine with this.