It would be nice if there were a way to attach Effects to weapons like you can spells. Especially once you unlock Critical Specialization abilities, many weapons have special effects they apply on a crit; weapon runes are another common source of this.
Currently you can work around this by creating a "spell" for the weapon and attaching the crit effects there, but it would be nice to be able to attach them directly to the weapon. This would also allow for class features, such as Power Attack or Sneak Attack, to be directly attached to the weapons they are most commonly used with.