I'm to agree with some of the questions given.
For players particularly interested in boosting their score, or seeing how they rate against others, it would be beneficial to have some idea as to how the numbers are generated.
For instance - Petdragon and Guidon of Cenarius. Guidon is 1 point above Petdragon. Ilvl difference between the two is -13X3 and 13x3 which cancels each other out.
Guidon is missing a belt buckle, and has 5 less points on 1 enchant. However, they have 1 extra gem compared to Petdragon.
So, mathematically, how does these differences equal 1 point?
The total of the item gear levels doesn't equal the gear score, the total score is higher.
The total of the enchantment points doesn't equal the enchantment score, the total is higher.
There is no display of how gems value against one player to another.
As I said previously, to compare one person to another, it'd be very helpful to know where exactly one is excelling over the other. Some guilds use this site to rank incoming applicant's or members for raiding positions as well. To them, knowing would also help.
