Back in the ages of confusion mesmer, I gotten my mesmer full ascended trinkets. And bam, Anet nerfed the setup and I got appointed to another role.
None the less Anet made me invest in a full ascended set which they nicely nerfed. But now I wish to give my backpack to another class, which is not possible since it is already upgraded and there is no way to unsoulbound any items, making the expensive investment useless.
My suggestion:
Less Unsoulbound Crystals or something, allowing you to unsoulbound an item. It will remain accountbound but atleast you can give the item to other characters.
You can sell it for gems, so you can earn money for it and both parties are happy.