Small changes in hated Champions kits

I know that my suggestions are'n impactful, but imho they're examples of changes in good direction, without gutting champion.

- We all know that she is problematic girl. Loved by circle-jerks, hated by every single common player, neutral for pros whos says "get good". Actually her winrate and pickrate are kinda high and whenever her overpacked kit is mastered then she's a moster carrying games 1v9. She was nerfed once this year but Riot decided to give her redress-buffs, and she is still strong.

What do I suggest? Whenever she cast her R2, then she is losing her "buffs" from R1. Actually when Riven is using her Blade of Exile she is repairing her sword, and she is buffing her dmg, range on attacks and abilities and she is allowed to use Wind Slash during this buff, and this lasts for 15 secs. Imho this is kinda rational that Wind Slash is a utilization of collected power in her "Blade of Exile", also this spell deals more dmg in low health targets. So why do Riven mains are supposed to do sick combos like R1 + R2(during E animaton) + rest of her skillset with more dmg and range? She alredy used her finisher in 1st moves of combo, so why she is supposed to keep her sword enchanted?

- I don't hate Yasuo, but i feel that he is overloaded and he is supposed to recieve small reworks and tweaks, because he is UNFUN to play against and he is pretty much highest ban champ over the years. To be honest "desing-wise" his **Windwall **is kinda stupid. By desing I mean a concept of character, his visuals, lore and his role in game. Yasuo is a swift ronin using wind(and sword) as his weapon, also he is solitary. He is about outplaying enemy, making fast decision and having fast moves. The idea of using wind as protection-tool is cool... but why it lasts for 3.75 sec? This is ability that says "I'm gonna all-in my enemy and I'll block almost everything from this ranged opponent", or "I'm gonna create better situation for my team, for whole teamfight".

Imho Yasuo can have his Windwall but as a wind gimmick, and QUICK BLOCK(not structure), he isn't air mage focused on protection(as i think about it his actual W fits beeter to ) , imho his W should last for 0.7 sec and he should be capable to keep 2 stacks of it. It fit's him perfectly, but numbers are a matter of balance.