Something I just noticed

There is not a single rune in the new system that directly interacts with crit. I mean, you have at least one for every other stat in the game: AD, attack speed, lethality, life steal, spell vamp, magic pen, AP, CDR, mana, mana regen, HP, HP regen, armor, MR, MMS, healing and shielding power, etc. However, there's nothing for crit. Not saying there should be, but it's just something I found odd.

What do you guys think about this?