Mages dominate the meta, I am glad Yasuo exists.
So, mages have dominated the meta, most of the mages are ranged, have frustrating one shot burst, and underwhelming easy mechanics. the three types of mages that exist in league goes as follow. Traditional mages 
(Aka I am the biggest tool ever,) One shot burst mages 
(aka Lel one shotted), or tank mage
(AKA I do too much damage and take no incoming damage.
The fact of the matter is while none of there champions are by any means impossible to beat, when they get ahead, they are devastating to your entire team. Yasuo stands a better chance earlier then Akali or Zed. So, Yasuo is essential to the meta. Yasuo also has the problem of being a God damn minion if he gets behind which, is easy to do.
I am aware some of there has viable counters like Swain is countered by Grievous Wounds. I am just glad one champion steps on League of Mages.
:U