Umm...I just realized a flaw in Malzahar's rework.
Well it's not really a flaw in his rework but Yorick's. What will stop the two of them from making the other useless?
Both are tanky, have the choice of AD and AP and are heavily focused around their minions. Obviously their ults and passives will be different bu t if feels like if you're going to ban Malz you might as well ban Yorick because their mains will learn the other and always be in a favorable position during Picks and Bans.
Maybe Riot has something really crazy in store for Yorick but they seem like they'd really clash with each other.