The problem is the cost. It will not be done unless all airlines are forced to do so. Transmitting data is expensive. I'm also not so sure this data will be secure, not that is has to be because as far as I am concerned, I really don't mind who looks at the data. Just so long as my company continues to pay me to think and not blindly follow SOPs, instructions, working practices etc. so unless you are working for one if these companies, this is a bad idea.
I also believe you are a little naive regarding who looks after the data. Like would you trust the Russians to play ball? This would enable them to shoot down an airliner and this time totally bury all the evidence. And do you think the Russians would transmit data to be handled in the West? And how enlightened are the airline managers east if 50E?
Such a system will be used by the big western carriers and disregarded by the rest, thus making it a pointless and very expensive exercise.