This seems a better place to post that an enchant score value is missing entirely rather than opening a debate that the value should be a little higher or lower. The value for Enchant Weapon Accuracy is showing up as 0.
All of the forums tell me that a mage's first priority in raiding is +hit, at least until it is capped. The Accuracy enchant gives +25 hit rating as well as +25 crit (crit is great for the frostfire spec I've been using for raiding). Accuracy is also similar in material cost to Enchant Weapon - Mighty Spellpower. Thus I seriously doubt that a value of 0 was intentional.