I think they still might. They have done similar reversals in prior decades. They would still be protected from lawsuits after reversing the doctrine by the first amendment. If they reverse it now, they can avoid JWs being put in jail for refusing blood transfusions for their children.
Although, in recent years, they no longer try to remove the child from the hospital in order to avoid transfusions. Nowadays, they just let the hospital get a court order and comfort the parents by saying that there was nothing they could do. So, they may just leave it as is. The only way I see this blowing up is if a child needs some other procedure that definitely requires blood and the parents keep the child from the hospital so that he/she will not be taken and given blood.