Some champions are just better versions of others
For example 
is just better 
and perhaps a bit of 
due to how his hard engage works.
In fact he is kind of like Yi with WuKong's ult and Braum's shield slapped on. This isn't to say I hate Yasuo or think he is OP. He is just... why would you ever pick Yi over Yasuo(except maybe jungling?)
This is just one example. There are plenty more. Too many champions fill the role, playstyle or even exact abilities of another, but even better. This is what happens when your game has 134 champions in it.
End point? Stop releasing so many new champions, start fixing old ones. Divert resources.
is a shitty version of 
. every 3 autos aatrox gets either a heal or bonus damage at the cost of his hp, if he choses the bonus dmg the inturn gets a small amount of attack speed. every 3 autos xin gets a heal and bonus damage, he can activate this spell to grant a lot of attack speed. Xin's e is a clickshot slow and gap closer which he can then activate q to get a free knock up after dealing a lot of damage. aatrox can miss both his knock up and slow the only benefit is that aatrox's knockup is aoe, but then again when is the enemy team gonna be that clumped, ori ult? aatrox ult is aoe damage (Flat) and an attack speed steroid. Xin's is aoe damage (%)+(flat) and gives armour and magic resist. cool cool.
