I think it could very well bite them. That been said I think the majority would still stay on - unfortunately my father would probably be on of them, and to be honest he is better off with them. I wouldn’t be surprised if there are some at the top that would like to change this policy but are unable to due to majority rule and legal ramifications.
Although this case has more to do with blood, it highlights the type of person who would leave them if they changed their policy. As I was awakening I worked with this fellow JW. He required heart surgery but the surgeon point blank refused to operate on him with out blood. At the time I seriously considered mentioning to him about the organ transplants, blood fractions. He passed away due to heart complications leaving behind a wife and 3 young kids. I seriously regret not having talked to him as the information could of saved his life, but weather he would of listened to me (he was PIMI /MS) or I found myself in front of a JC on the charge of apostasy would be another matter.
Could you imagine the termoil and law suites this would leave behind for his family if wt had new light on shunning or blood.