your argument hardly talks to the bias laid out in this article. The problem is not that a white student with perfect SAT's will gain an admission, but that the same student with a lower score can gain admission while an asian with perfect scores cannot. Essays are important , but they are a tool to hide behind.
if the existing tests are not good markers of excellence, why dont harvard and stanford have their own entrance examinations? it is a common practice in universities around the world.