Yasuo and Warlord's Bloodlust: keystone mastery

Not sure if was intentional or not, but with the advent of this specific keystone mastery (Warlord's Bloodlust- Critical strikes heal for 15% of the damage dealt and grant you 20% attack speed for 4 seconds (2 second cooldown). ) Yasuo is very hard to play against.

Couple this with Yasuo's passive (Yasuo's critical strike chance is doubled) and red/quint crit chance runes ( (0.93%x9) + (1.86%x3) ) = 13.95% crit chance at level 1 yasuo. This means that yasuo will heal on his q for ( (20 + 55AD) x (1.5 Crit Dmg) x (.14 crit chance)) = 15.75 health on average with no extra ad... Since his q is on a 4 second cooldown, this is like effectively 15.75 HP5 in the early game with minions. Also didn't even take into account the extra attack speed.

The problem is that his sustain is nearly unlimited due to not having mana in the early game, and his healing increases dramatically in the late game with items that increase AD or increase crit chance or increase crit damage. So he never has a moment of weakness really, and no matter his build path, if he takes Warlord's Bloodlust, he will still have great healing.

Anyone else want to add in on this conversation?