Ok, I can't confirm DataLink is working. I don't know what is the reason (I must do more tests), but seems that works randomly. In my first test with a group of 4 units (all humans), the circles in abris works ever, but the transfer of data works randomly, worst if the group is more than two units.
In another test with only two units (multiplayer), datalink data transfer worked, not as smooth than 2.5 release, but the transfer worked at second or third attempt.
I will continue making tests, but yes, datalink is not working properly.