2 13 Feb 2015 21:06
Some people consider trackbacks as a legacy feature, so I don't know how much support could be around your idea. Maybe automatic pingbacks between posts made on b2evolution sites would be better (if is not already implemented - I have to dig deeper).
I also thing that a feature exactly as you suggested is perfect to be developed as a third-party plugin, it would be nice if somebody in the community take the lead on it.
As always, this post will be in the developers' Improvements list and they will evaluate how to proceed.