You can express it all you want. But unless your offering to pay for the scope of work needed, ANet has ruled out this happening in the near- and long-term, if ever, due to the amount of work required to do so, including possibly modifying the clients base procedures for item look-up, parsing and so on. Several employees have stated this, relevant posts linked, etc., especially concerning back pieces which was also covered in the above posts. tl;dr ANet employees might want to, but it's not going to happen. Don't get me wrong, I would love to be able to dye back pieces, but it's not happening. Weapons? Couldn't care less.