Ok if Tanksuo is what we choose to blame, my favored idea would be
Rework 1: the one suggested by a player below me who says to have scaling defenses for tanks. This way true tanks get more benefits of tankiness while offtanks or fighters get a bit lower benefits. This will reduce the chance of anyone else like vayne or graves suddenly becoming problems. (Graves already had his time)
Guys, remember yasuo is a fighter, he isn't supposed to be squishy, he is supposed to be like a diana (best representation cause of shield), xin zhao, (erm lcs ekko), nocturne, etc. In all honesty, to me champions/players should be building according to how the game is going. It makes little sense to me to keep building full damage when u are super far behind with a nonadc other than vayne ;) just a suggestion. If someone rushes a randuin's omen and a frozen heart, why would i rush shiv/ie? I would prefer to rush maybe a black cleaver+bork or a frozen heart+triforce to kite them. (bork takes objs like barons and goes through hp tanks); triforce takes turrets.
Another idea could be
Rework 2: Arkadata's. I just would strongly emphasize that his lvl 1 q not be nerfed. Right now, his e's and lvl 1 q give him a strong lvl 1-5 (or lvl 1-3) depending on the matchup before he gets ridiculously weak till late game, unless he starts to snowball.
In the end though, to be honest, I just don't like seeing removing versatility from the game. To me, fervor of battle is a real problem. It is more or less the to-go mastery for every adc. I find it a bit ironic since the new mastery system was added so that we wouldn't all pick the same things in the same situation.
My last idea would be to add an item to removes shield though. I think shields are the one thing that have no counter play. Now, i would not say add one that prevents the flow from stacking up. Looking at recent history, shield holders like lulu (remember pro play last year), janna, tahm, etc and now sterak gage holders are just being annoying.
Ya, I'm trying to say don't change yasuo's moves, although nerfs are fine and don't weaken his early game (lvl 1 q and his es). Tyvm. :)