Oh dear oh dear.
You continue issuing instructions to aircraft that are flying an RA????
No. Read my words before opening your mouth next time. I do give advisory traffic information and suggest avoiding action. Did I mention the word "instruction"? No. The avoiding action I gave on both occasions was a turn to the traffic not involved in the TCAS debacle.
Apology accepted.
Notice you skipped over my point re: safety and datalink. You argue against yourself quite well there. Yes datalink could work faster than a human. As far as I'm aware thats not under discussion. The point is that if it fails, and
it will then the controller needs to be able to take over, which would not be possible with your scenario.
Finally, CPDLC had a predecessor, PETAL, which was used also for years, and much was learned from it. Europe are not "reinventing the wheel" as you put it, but Eurocontrol along with many other organisations, are putting a great deal of time, effort and money into a huge project which is seen as the future of ATC.