How about to make an event to create an item designed by the community?
Could be:
- 2 items per year.
- 1 item per year (GD anniversary).
- once in a life time.
Choose item type:
- armor
- weapon
- accessory
Choose stats:
- offensive oriented
- defensive oriented
- damage type
- whatever…
Choose granted skill:
- active skill
- on attack
- on critical
- whatever…
How to do it?
A Crate Dev or a Praetorian could open a thread with a poll to vote every aspect of the item. The poll could last a week or whatever. Then we move to the next aspect to vote.
You could communicate the event on media (twitter, facebook, whatever).
Even you could add an achievement on steam by getting such item.
I saw this on D3. They made a legendary sword. You can see more info here.
Sounds like a fun thing to do.