User blog comment:Slashingstrike/Master Yi's Wuju Style rework idea/@comment-3578129-20180617144841/@comment-3391671-20180624081220

"Master Yi more movement speed to emphasize on his primary attribute which is speed but since many other champions are faster than him I also added slow against them to keep up Yi's speed."

This is what I meant by "extra attributes." Choose either one or the other, since his Ult already features the said bonus MS. I'd give him a burst of MS (decaying over a sec) during his Q instead of on this E, and make it a priority that this item enhances his ability to shred tanks. Once again, having one ability apply many things at once for a champion who had a simpler ability is still a big buff, even if mobility has changed and Yi needs to adapt to time. I'd still not even go for applying a Slow because what does seem defining for Yi is his lack of CC, like some other champions; if he wants CC, he may need to buy an item to help that. Otherwise, CC is the job of his allies, not him. Being self-sufficient is always nice, but to balance out a character, you need to take care that a character does not overdo this, unless at the sacrifice of other things.