Some good stuff in your posts guys and gals. Some of which mirrors my views below. Me? After the great Pio Hours reducing to 55 "certainty" I am a little more wary. But ...
What motivates the GB? - consciously or otherwise - as a collective whole. Imagine your body of elders as a board of directors with more talent for climbing the greasy pole and the ability to realise they will die as humans. They probably, as a group believe they are directed by Jehovah. Remember the GB do not believe they will live forever on paradise earth. Unlike we did.
In no particular order the first three are IMO:- 1. Retaining authority, power and position over a steadily increasing "organization"
2. Reflecting Jehovah's will (with a huge investment in old testament values) 3. $$$$$$! (Their control over it as a group)
Then certain individuals will wish to:- Care for the flock/Air their own pet peeves/have their own agenda
So where does keeping the blood ban fit in:
Plusses -
1. Doing Jah's will (according to their mad interpretation)/ keeping them in power and not having people leave
2. They have persuaded themselves that blood is medically bad for people (and this may be true in some elective non emergency situations)
Minuses -
1. Places like Russia and France use it to restrict jw expansion
2. It slows outside growth to a standstill in the West
3. It costs money/time in HLC's; lawsuits etc etc.
So what to do:-
Keep on as they are and slowly release the reins. The obvious one to me is to make the "four major components" acceptable as they have done with haemogoblin. In the West that opens up all the life saving measures of blood and they don't care as much about Africa (Malawi anyone?) do they?
Then later they can withdraw the HLC involvement to advice to tell the brothers they would be wise to follow their physicians' guidance as long as they do not have "whole blood". They can tell elders to back off.
They won't - because they are takers - but they could use old testament passages such as selling blood filled carcasses to the nations to justify giving blood or Saul's men eating along with the blood with little sanction in a non emergency situation to justify having large fractions too.
I would feel my family were much safer if they dropped the 4 main components ban and I hope they do - it's the most I can expect within the next, say five years and it will come with a "dealing with modern medical complexities" is not our focus justification.