I dont get the purpose of that sheet, too. The keywords are nothing you wont find via Google, the projects list cover very well known projects. Why should anyone extend that sheet?
Okay, tell me how you being newbee in blockchain world, instantly searched in the Google words like "Ring signature'' "Mijin" "pBFT" and have already known in what kind of projects they were used. You guys are so interesting, if you found it useless, it doesn't mean, that everyone else would.