@Riot: Why does Yas still have double crit chance?

With every champion has his passive, and Yasuo can get 100% from nearly any single crit item, and the 15% true damage completely overshadows the 10% reduction to his damage.

On a side note, why does everyone need to deal true damage? I know "League of Tanks" was a meme for awhile, but does giving every champion all of the tools to ignore their tankiness make sense?

Like, imagine someone wants to build Pyke as a tank. All of the armor, magic resist, and damage resistance in the world can't save him from true damage, and then there is Vayne. ∞ armor and health, and Vayne still can kill them in 12 autos, half if she has