[AndyBare]

My suggestion would just say any ball that cannot be put back into play is "dead." No ball will replace it. This will increase downtime between cycles as an alliance lose their balls to "death" by getting them stuck, etc. It will make teams sure that they do not want to be the problem. This will encourage teams to make sure batteries are charged, autonomous works, etc, without blindly putting a robot onto a field where there is a chance of something going wrong.