NERF THE YI (Dispatches champions far too quickly)

This is my first post regarding nerfing a champion , im currently stuck in B3 and the sometimes the issue is really having yi on the other team. Before you guys come at me like oh hes squishy or thornmail or hard CC , dismiss all from your mind and view my opinion first. Firstly the problem i find with the master yi is his R its waaaay over powered even when ur KDA with him is (1 9 0) or w.e mid or late game he can just R with the right build and is guaranteed like a triple kill or more and just carries the game from there. for those who dont know for every kill he gets extends his ult by 4 secs more and in a team fight we all know some fight barely last like 10-15secs or less if there isnt much tankiness or hp going on, not only that but the the take downs also reduce the current cooldown of Master Yi's basic abilities by 70%!! So u combine that with His Q which doesn't even allow u to attack him because it makes him unable to be targeted during it and u got a champion thats nearly impossible to take down in some moments because he dispatches everyone so fast its unfair ! The nerf numbers that seem fair to me and that i will show below are the following:

High Lander Passive: Champion takedowns reduce the current cooldown of Master Yi's basic abilities by 70% - - - - 50%

Bonus Attack Speed: 30 / 55 / 80% - - - - - 25 / 50 / 70%

While active, champion takedowns extend the duration of Highlander by 4 seconds - - - - 3 seconds

And that's it. That's what i personally think would be fair with Master Yi and give teams a few more secs to take out Yi instead of having no chance. After rage gun blade hes just too damn fast riot . [zombie-brand-clap]