The fact of being possible to be purchase from people even without trading and even without donating was also offered back when the item was first introduced to the community. It would be indeed possible to get it from bosses and story small partions and then glue them together to make a Coin Capsule, which grants you 100 coins and the change to choose what you want with said coins. When something is added, it will be mostly seen for everyones eyes, so even without the materialisation of the item it was being planned ways for everyone to have it.
However, was denied in a big weight even with this conditions, Thor appealed for it many times to the community but it did not seem to be appreciated.
As for now we will let the IV Reroll disable for a few weeks and apart of my job is studying how features are reacted to, and will have special attention to this item feedback. We could do a voting and study what to do from there.
Thank you for the analises of the situation, and I will leave this thread open to gather other peoples ideas :)
And since you touch the Legendary unfortunatly IV/Nature status, a new feature will appear to make those unfortunate legendary cases a bit better, I will not put into words of what will be otherwise it will ruin the surprize. I understand its boring to wait, but it will arrive.