Yeah, but it could also show that your reblog wasn't "nothing" in many ways.
Having followers with a lot of stake should be valuable, I know for instance @blocktrades follows me and many authors would be thrilled to receive a vote from that account. Now if I can reblog something that he finds so interesting and worthy of a big vote, that'd be valuable both to me the one doing reblogs right, the author and hive as a whole because rewards went to worthy content.
Now he may still vote a post I reblogged, but if I never find out if he voted it due to my reblog or if he just happened to see it in the hot/trending list or other reasons, that doesn't let me know if I was on the right track of using reblogs properly. There is no feedback so to speak unless I straight up went and asked him if he found this post through me which would be a bit unnecessary.
There may also be many users who never reblog because they may think it doesn't do anything since they never see the feedback and effects in action.
That's kind of the idea behind it, it could also offer a different kind of feedback loop that maybe you're reblogging someone too often and your followers aren't interested in curating that account - but I think the other point is way more important to empower.
ohh you want traceability in a sense that you'd like to see how far the engagement reaches and the trends for the things you reblog, is that it? because if it's trend tracing. that's gonna be a toughie but if it's for how big your reblog can contribute to an author. that color system does fit the bill. gonna be a lot of coding to show contribution level though and a lot of entanglements on if you're upvoted a mutual follow and on who gets credit there