As discussed in #help, I would like to use this datapack on the Pandamium snapshot server which I help work on. Currently, operators must manually transfer players' scores from their old IGN to their new IGN when they change it, and on request transfer the scores to a new account altogether. That is usually up to 50 scores to manually transfer, so the ability to automate this with your datapack would be great; however, there currently isn't a nice way to change the UUID of a player's entry while keeping the same uid, as changing the UUID messes up the UUIDdb. This makes transferring data across different accounts not easy.
The server has had thousands of players, and currently has hundreds of active players, so it would be greatly appreciated if you could implement this feature, as you know how to navigate the pack best.