Your article concludes with:-
In this review, we have discussed important challenges in practical QKD.
They are all listed therein.
Consider the providence of this article. Nature is one the most respected publications in all of science. If they cure cancer, it will probably be first published in Nature. I'm not sure what we lowly minions might be able to add, unless you are looking at a more specific issue. Although the 182 references will probably cover them all. Having been accepted 29 May 2016, it's pretty up to date too.
I suggest that Yuan's contribution adds a very important commercial aspect to the work. Toshiba are interested ultimately in profit and prestige (as is correct for a company), so it is in their interest and the article's breadth that real world QKD is covered.