This ^^^. They will never in the name of safety just implement the rest of series because if a player gets shaken up he should come off and be checked. Here is what I said in another thread in the past week and I think it would be a similar policy to a basketball injury that gives coaches a choice:
Hurt players need to go off for rest of series whether obvious flop or not. Allow coaches to use their timeout to get them back in just like basketball. I would also be ok to give them two injury timeouts a half that could only be used to reinsert players before series is over but the injury timeout does not stop play. Player has to go off, he can be checked out and if he is good to go then coach can use his injury timeout to reinsert him. The injury timeout just allows the reinsert. Once they have the injury timeouts, you have player sit the series or use your regular timeouts. I would also be in favor of no players can substitute on either side during injury timeout
The above allows for safety of players, stops flopping or coaches lose timeouts. Win win.