
Zair is a really whatever move to use right now, even with chain hook’s very low buy rate you don’t see a lot of Slades use the zair as an actual attack.
The hook of zair at its max range of extension should pull the opponent towards Slade (obviously can be floorhugged/crouch cancelled). PM ZSS side b does something similar and I think it could work well to give Slade an aggressive tool in MUs where he struggles against the poking game of characters like Clairen and Forsburn, which are two of his worst MUs.
Also it’s a hook pulling in the opponent makes sense.