Jhin's attack speed conundrum.
Make his Attack speed scale like everyone else's but give him a special passive that leaves his actual attack speed the same as it currently is. He would get upwards of 1.7-2.5 (or even a higher limit for him similarly to kog'maw) but it would keep his actual auto attack timer to .67 or whatever it is now.
This way he can still scale properly, but he can actually be effected by attack speed slows.
Just my 2 Cents, as I'm just trying to help keep the game consistent and healthy.