Suggestion: New Device called the Null Cube
I also would like a Null Cube, but not for traveling.
I suggest an item called Null Cube, for 1000 gems (special offer, limited time). Upon use, this item completely resets your account: removing all items and gear, deletes characters, remove all progress, clears bank and storage. All achievement points and all upgrades with gems are kept back (bank slots, character slots, shared inventory slots, etc.)
This item would be perfect for people that want to start over, or want a fresh restart, or simply wish to leave the game. This item should be with infinite uses (aka not consumable), so when you come back, you would remember why you reset everything, and reset everything again to make sure content is completely removed.
I would be the first to buy this. I will help my conscience a lot, making it easy to get over many flaws and mistakes. However, I am not willing to spend more than 2000 gems for this.