Lifesteal, your thoughts?

Needs to be made cheaper, so auto-attack oriented bruisers can afford it again. Currently, ADCs and melee carries are the only champions that can afford lifesteal in their builds, without being set back, and defensive itemization isn't strong enough to compete with their sustain and high damage. Part of the reason carries get so out of control now is because AD bruisers (particularly the ones that don't build Black Cleaver), no longer have access to lifesteal and defensive itemization alone isn't enough to keep them alive past mid game.