Seems people with Enchanting are getting Bonus points.
http://wow-heroes.com/index.php?zone=us ... &name=Dynn
Looking at myself I have everything enchanted, almost all are scored 15. I have 133 enchant score leading me to believe the max possible is 135.
http://wow-heroes.com/index.php?zone=us ... &name=Nehu
However if you look here, he has 170 Enchant score. So he's getting an additional 35 from somewhere.
Also it seems you're going with raw ilvl for gear score, however there are superior items with ilvl200 as well as epic. The epic items are far better than the superior and should definitely have a stronger weight. Going by the current system, someone in full ilvl200 blues could share the same gear score as someone with full ilvl200 epic gear. You and me both know however that there would be a huge stat difference between the two.