Why does Kayn have better cc than tanks?
He gets a ranged aoe knockup on a basic ability (let that sink in for a sec). What's the point of playing tanks when Kayn does their job better? Hell, he can even build somewhat tanky and still do good damage to literally ANYONE he wants.
a bruiser with 1 aoe skillshot hard CC,
a bruiser with 1 Aoe skillshot hard CC,
a bruiser with 1 (x3) aoe skillshot hard CC, and 1 Single target hard CC.
A tank with 3 forms of hard CC 1 aoe 2 single target.
a tank with 2 forms of Aoe hard CC,
a tank with 1 form of aoe CC and one single target CC,
tank, 1 aoe hard CC 2 single target hard CC.
outplayed you with his W doesn't mean it IS broken ;)