Yasuo rework idea to address his current problems.
Passive: Double crit is just uninteractive free stats. Remove: No longer doubles critical strike chance. New effect: Yasuo always critically strikes while his shield is up. New effect: Flow charge rate and shield power are now increased by yasuo's crit chance. New effect: Yasuo charges 25% of his flow on critical strikes. New effect: Yasuo's shield persists until it is depleted if he is in combat with a champion, flow can still charge while in combat. Otherwise it lasts 1 second.
Q: No longer charge on minions, it's too easy for yasuo to sit back charging his tornado on a wave and engage from range. Now applies on hit effects to all targets hit instead of only the first. Critical strikes with this skill now does full damage. Is now affected by cooldown reduction (still affected by attack speed).
W: no changes.
E: On target cooldown now scales with cdr. Range and travel speed are now increased by yasuo's critical strike chance. Damage can now crit and apply on hit effects on all enemies.
R: No longer gives armor penetration. Now gives yasuo a wind shield that deflects all projectiles (like a wind wall) for the duration.
Aghanim's scepter upgrade: Causes allies that cross his wind wall to gain his ult shield for 5 seconds.
This rework will make yasuo more interactive with his opponents and teammates while removing the invisible power from his passive and ult, this separating good yasuos from great yasuos.