Yeah that's a good one! I hate that. However, the rule is different in AYSO. I ref for AYSO and we allow the player to stay in. But then again, I referee in the USSF too and once the coach approaches the pitch with the referees permission we have to take the player off.
Grand opening was pushed back once again, we'll just say it's TBA for now. We are still waiting on the completion of some custom development that has been in the works.