This might mean easy duplication across multiple battle.nets for boxers. I wonder what will happen if you withdraw a copy of each heirloom on one character and then transfer that character between battle.nets. Do the heirlooms/toys unlock on the new one?

If so, very nice. If not, it might make sense to manually split them up beforehand where you have duplicates.

Much like account wide mounts caused an issue with people selling a full slate of mounts before they fixed that, I wonder how they're going to avoid a similar fiasco with this.