I'm not sure if this has been discussed before but how does it sound?
Some people just like to use the same weapon, like to see that weapon on his character and just don't want to change that. While this is not an issue to Elementalist, I think it is a great idea for a new patch update. Instead of giving the ability to a class to hold a weapon that he was not able to hold before, let him toggle the skills of the same weapon. My imagination is something like:
Guardian Staff 1 - [Support/range] Guardian Staff 2 - [Melee + 200% Healing power]
Ranger Bow 1 - [Range Attack Skills] Ranger Bow 2 - [Magic Arrow Skills]
Mesmer Greatsword 1 - [Range Attack Skills] Mesmer Greatsword 2 - [Melee Skills + Defensive Phantasms]
I think most people toggle weapons just to substitute cool-down of the current weapon, not to adapt according to situation. Just saying, I think it's just the idea or the visual kinda bothers me.