With some friends we used another CS match analysis tool, scope.gg, and it took many of those things in action. It knew how to estimate your grenade/smoke/flash/molotov throws on how effective they were, your risk-taking (e.g. peek at a common place to get insta-headshotted), even your footsteps being heard by the opponent in stealth parts.
Really, this tool was much more accurate than anything based on the metrics presented here. And it showed, because it consistently nominated one friend as the best one, which matched our experience, and myself as the worst one of the team, which also matched our experience :D
Cool article nonetheless, and really show the issue with current counterstrike (and why I don't play it much anymore): the skill level is so high that you basically need tools to tell you your mistakes. Otherwise you're in for a truckload of frustration as a new player.