The thing about blocking techniques in karate is that they all contain evasion, covering, parrying, hard blocking, redirection, and striking.
As for the article, I don't quite agree with your application of karate's blocking techniques. I think that the initial parry/cover is being left out. This technique allows you to use the "block" to strike or at worst block the second incoming strike. I also believe that there must be more controlling of the striker's attacking limb and posture.