>I hate to do it but I have to agree that there is not much of a difference between the "standard" grading system as you propose and 'slabbing' except that the "expert" is known and trusted and words instead of a numeric value are used.

Actually there is a huge difference, the difference is that defining a grading system does not set up a "grade" for a specific chip. Each person still needs to grade a chip on their own, the standard only provides common language.