Currently, in the game, most weapon and armor charms are in total disuse because they are much lower than what is considered as Bis.
See some enchantments and mention some improvements in those that are not Bis:
Bronzewood Enchantment vs Feytouched
Bronzewood Enchantment: Your At-Will, Encounter, and Daily powers deal 5% bonus damage as Arcane damage.Targets struck by your encounter powers become marked for 10 seconds. Marked targets will take 10% more damage from you and allies, and marked targets receive -3,000 Deflection.The target can only have a mark applied once every 20 seconds.
Feytouched: Your At-Will, Encounter, and Daily powers deal 5% bonus damage as Psychic damage.Your daily powers decrease target damage dealt by 10% and inflict -3,000 Deflection Rating. This effect lasts 10 seconds and may only happen once every 30 seconds.
There are 2 enchants used by Tanks, one for another in disuse. While Bronzewood activates or bonuses to use any power or Feytouched, you can use a daily power to activate the bonus. Those who use Bronzewood no longer care about Fey's damage resistance bonus, for them their enchant is better because it increases the damage of the entire group, including yours. Those who use Fey are tanks that still need that damage debuff, but it is a very difficult bonus to be able to activate. Why not put Fey on the same level of Bronze bonus activation? Bronze would still be Bis and Fey would become more viable.
I could also make a comparison of Shadowclad vs Negation, mentioning that Shadowclad stacks are much easier to maintain and more beneficial than those of Negation which can hardly stack to activate the second bonus which gives a very low cure.
I wouldn't know what level other enchants like Flaming, Plague and Terror are at, but I know that the Prominence that was the last enchantment to be released in the game is not where it should be.