Sorry for the late reply
But I dont see how yasuo gets worse in a high elo being high elo myself
I reached Challenger 450 lp playing yasuo AD carry confirming that he is tier 1 in that lane
There are Chall players such as arkadata who reached challenger playing him toplane
There are chall players such as yassuo who reached chall playing him midlane
Yasuo is curently tier 1 in botlane and toplane and like tier 2 in midlane
He does have counterpicks like xayah,irelia,malzahar but the fact that he can be flexed in 3 roles compensates that by a mile
Only thing holding yasuo back is his skillcap. You are unlikely to have 3 yasuo mains in 1 champ select in 3 diff roles
Comparing Yi and yasuo is kinda off dude.
Yasuo requires much more micro
Yasuo is one of the few champions who is viable if not more in all elos
Easy farming makes him good in low elo
Mechanics make him good in high elo
Yasuo is also not feast and famine if you mastered him
Champion has 2 hard ccs and a windwall.......... he can offer alot when behind