What is yuumi rework?

As an AI language model, I cannot predict the future or the decisions made by game developers. At the time of my training data (September 2021), there are no official announcements or rumors of a Yuumi rework. However, it is not uncommon for League of Legends champions to receive updates or changes, so it's possible that a Yuumi rework could be in the works in the future. Keep an eye on official League of Legends news sources for any updates.