Once upon a time, blood in any form was rejected by Jw's. Then, over time, they morphed the policies to allow some 'fractions' or blood. This allowed witnesses to get immunizations, treatments for hemophilia, etc.
IN the past few years now, the policy is allowing greater 'definition' of 'fractions' - to the point where even Bovine RBC's, altered to be called a 'fraction' now, due to processing the hemoglobin from the cells, for use.
What is the next step in the 'process' of 'new light'?
I believe it will be fairly simple; they will begin to call 'The four primary components' of blood, just 'fractions'. They can run a circular argument better than anyone around, as we know. They just develop a position that says; Blood 'components' is just a mad made idea, that any part of the blood could be constituted a 'fraction', since that is the meaning of the word. Therefore the only 'verbotten' use of blood medically would become the transfusion of 'whole blood'.
This would allow the witnesses to use plasma, RBC, WBC transfusions as components. This would save most lives, and eliminate many problems medically, as whole blood is not used all that often to begin with.
The next step is down the road some years from that - once the JW's are used to being able to use blood components. The WTS is no longer killing people with it's policy, memories have faded regarding the damage done, and witnesses are not even aware [as sheep are prone to forget old light in few years - then even deny it to defend the organization]. The GB 'discovers' that the prohibition in Acts applies simply to 'eating of blood for food' - which is how most mainstream religions see it anyway - and the 'new light' would then allow 'whole blood' use medically.
Of course, skilled manipulators of the policy [including those on the HLC's] will have effectively done the same for years anyway - instead of 'whole blood' - they would have ordered the infusion of the four separate 'components' in places where whole blood is called for anyway.
By doing it this way they eliminate the lawsuit thread [or at least reduce it] due to time passing. They get to have 'new light' that will be rejoiced in by the flock who always thought it suspicious or confusing to begin with, and the concrete policies of the past have vanished without a trace.
Forty years later, the dubs will be denying to those one the doors that they ever had such a policy, just like they deny the 1975 debacle now.
Anyway, just a postulation that I could see happening.
Jeff