Indeed, the authors (I am one of them) would appreciate this. I'll personally add any extra papers you find to the plots. If it turns out we really left out some important papers, we (or at least I) will publish a revision to the paper.
I would very much like to hear your opinion on the perspective I am (unsuccessfully) trying to draw attention to via my comments in this thread. I believe this, and things like it, are far more important than people are willing to consider.